/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:08:15,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:08:15,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:08:15,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:08:15,185 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 [2021-06-12 22:08:15,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:08:15,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:08:15,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:08:15,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:08:15,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:08:15,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:08:15,218 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:08:15,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:08:15,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:08:15,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:08:15,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:08:15,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:08:15,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:08:15,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:08:15,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:08:15,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:08:15,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:08:15,221 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:08:15,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:08:15,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:08:15,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:08:15,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:08:15,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:08:15,476 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:08:15,477 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:08:15,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2021-06-12 22:08:15,478 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2021-06-12 22:08:15,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:08:15,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:08:15,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:08:15,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:08:15,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:08:15,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:08:15,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:08:15,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:08:15,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:08:15,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/1) ... [2021-06-12 22:08:15,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:08:15,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:08:15,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:08:15,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:08:15,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (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 [2021-06-12 22:08:15,598 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:08:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:08:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:08:15,599 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:08:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:08:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:08:15,599 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:08:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:08:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:08:15,600 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:08:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:08:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:08:15,600 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:08:15,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:08:15,792 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:08:15,794 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:08:15 BoogieIcfgContainer [2021-06-12 22:08:15,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:08:15,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:08:15,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:08:15,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:08:15,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:08:15" (1/2) ... [2021-06-12 22:08:15,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7308ee7a and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:08:15, skipping insertion in model container [2021-06-12 22:08:15,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:08:15" (2/2) ... [2021-06-12 22:08:15,799 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2021-06-12 22:08:15,802 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:08:15,802 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:08:15,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:08:15,803 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:08:15,839 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:08:15,853 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:08:15,866 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:08:15,866 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:08:15,866 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:08:15,866 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:08:15,866 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:08:15,866 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:08:15,867 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:08:15,867 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:08:15,889 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 22:08:15,934 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) [2021-06-12 22:08:15,936 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) [2021-06-12 22:08:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 22:08:15,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:15,943 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:15,943 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash -520695315, now seen corresponding path program 1 times [2021-06-12 22:08:15,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:15,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488773821] [2021-06-12 22:08:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:16,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:16,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488773821] [2021-06-12 22:08:16,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488773821] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:08:16,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:08:16,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:08:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186960832] [2021-06-12 22:08:16,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:08:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:08:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:08:16,113 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:16,168 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-12 22:08:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:08:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 22:08:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:16,185 INFO L225 Difference]: With dead ends: 217 [2021-06-12 22:08:16,185 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 22:08:16,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:08:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 22:08:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-12 22:08:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-12 22:08:16,220 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-12 22:08:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:16,221 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-12 22:08:16,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-12 22:08:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:08:16,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:16,226 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:16,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:08:16,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-12 22:08:16,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:16,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529131147] [2021-06-12 22:08:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:16,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529131147] [2021-06-12 22:08:16,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529131147] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:08:16,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:08:16,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:08:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294186484] [2021-06-12 22:08:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:08:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:16,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:08:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:08:16,275 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:16,302 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-12 22:08:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:08:16,303 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 [2021-06-12 22:08:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:16,304 INFO L225 Difference]: With dead ends: 158 [2021-06-12 22:08:16,304 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 22:08:16,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:08:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 22:08:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-12 22:08:16,320 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) [2021-06-12 22:08:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 22:08:16,321 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-12 22:08:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:16,321 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 22:08:16,322 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) [2021-06-12 22:08:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 22:08:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:08:16,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:16,323 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:16,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:08:16,323 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1197401099, now seen corresponding path program 1 times [2021-06-12 22:08:16,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:16,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864145575] [2021-06-12 22:08:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:16,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:16,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864145575] [2021-06-12 22:08:16,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864145575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:08:16,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:08:16,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:08:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200907911] [2021-06-12 22:08:16,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:08:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:08:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:08:16,359 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:16,387 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-12 22:08:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:08:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 22:08:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:16,389 INFO L225 Difference]: With dead ends: 183 [2021-06-12 22:08:16,389 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 22:08:16,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:08:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 22:08:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-12 22:08:16,397 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) [2021-06-12 22:08:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 22:08:16,398 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 22:08:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:16,398 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 22:08:16,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 22:08:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:08:16,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:16,400 INFO L472 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] [2021-06-12 22:08:16,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:08:16,400 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-12 22:08:16,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:16,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201803940] [2021-06-12 22:08:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:16,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201803940] [2021-06-12 22:08:16,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201803940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918331535] [2021-06-12 22:08:16,704 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 [2021-06-12 22:08:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:08:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:17,165 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 18 treesize of output 12 [2021-06-12 22:08:17,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,170 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 16 treesize of output 10 [2021-06-12 22:08:17,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,175 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 23 treesize of output 15 [2021-06-12 22:08:17,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 22:08:17,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,195 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 23 treesize of output 15 [2021-06-12 22:08:17,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,200 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 16 treesize of output 10 [2021-06-12 22:08:17,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:17,221 INFO L628 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2021-06-12 22:08:17,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:17,232 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:178, output treesize:17 [2021-06-12 22:08:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:17,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918331535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:17,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:17,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472473054] [2021-06-12 22:08:17,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:17,260 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-12 22:08:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:17,424 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-06-12 22:08:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:08:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-06-12 22:08:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:17,427 INFO L225 Difference]: With dead ends: 298 [2021-06-12 22:08:17,427 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 22:08:17,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:08:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 22:08:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-06-12 22:08:17,436 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) [2021-06-12 22:08:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 22:08:17,437 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 22:08:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 22:08:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-12 22:08:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 22:08:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:08:17,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:17,438 INFO L472 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] [2021-06-12 22:08:17,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:17,658 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-12 22:08:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:17,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353953345] [2021-06-12 22:08:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:17,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:17,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353953345] [2021-06-12 22:08:17,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353953345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:17,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127434844] [2021-06-12 22:08:17,864 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) [2021-06-12 22:08:17,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:08:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:18,128 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:18,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:08:18,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:18,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:18,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:08:18,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:18,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:18,154 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 [2021-06-12 22:08:18,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:18,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:08:18,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:18,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:18,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:08:18,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:116 [2021-06-12 22:08:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:18,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127434844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:18,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:18,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 22:08:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977326933] [2021-06-12 22:08:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:08:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:08:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:08:18,374 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:18,853 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 22:08:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:08:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:08:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:18,858 INFO L225 Difference]: With dead ends: 374 [2021-06-12 22:08:18,858 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 22:08:18,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:08:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 22:08:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 22:08:18,875 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) [2021-06-12 22:08:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 22:08:18,876 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 22:08:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:18,879 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 22:08:18,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 22:08:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:08:18,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:18,880 INFO L472 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] [2021-06-12 22:08:19,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 22:08:19,097 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-12 22:08:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:19,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878093949] [2021-06-12 22:08:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878093949] [2021-06-12 22:08:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878093949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110208021] [2021-06-12 22:08:19,217 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) [2021-06-12 22:08:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:08:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:08:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:19,345 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 16 treesize of output 10 [2021-06-12 22:08:19,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 22:08:19,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,351 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 16 treesize of output 10 [2021-06-12 22:08:19,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,354 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 18 treesize of output 12 [2021-06-12 22:08:19,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,357 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 23 treesize of output 15 [2021-06-12 22:08:19,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,360 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 23 treesize of output 15 [2021-06-12 22:08:19,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:19,373 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-06-12 22:08:19,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:19,374 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-06-12 22:08:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:19,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110208021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:19,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:19,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:08:19,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698032225] [2021-06-12 22:08:19,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:19,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:19,399 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-12 22:08:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:19,547 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-12 22:08:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:08:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 22 [2021-06-12 22:08:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:19,549 INFO L225 Difference]: With dead ends: 363 [2021-06-12 22:08:19,549 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 22:08:19,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:08:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 22:08:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-12 22:08:19,554 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) [2021-06-12 22:08:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 22:08:19,555 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 22:08:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:19,555 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 22:08:19,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-12 22:08:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 22:08:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:08:19,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:19,556 INFO L472 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] [2021-06-12 22:08:19,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:19,769 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-12 22:08:19,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:19,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753628449] [2021-06-12 22:08:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:19,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:19,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753628449] [2021-06-12 22:08:19,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753628449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:19,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260159211] [2021-06-12 22:08:19,899 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) [2021-06-12 22:08:19,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:08:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:20,102 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:20,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:08:20,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:20,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:20,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 22:08:20,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:20,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:20,189 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:20,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:08:20,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:20,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:20,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:08:20,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:20,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:20,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:08:20,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-06-12 22:08:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:20,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260159211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:20,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:20,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:20,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794846365] [2021-06-12 22:08:20,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:20,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:20,345 INFO L87 Difference]: Start difference. First operand 241 states and 694 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) [2021-06-12 22:08:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:20,599 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-12 22:08:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:08:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:08:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:20,601 INFO L225 Difference]: With dead ends: 425 [2021-06-12 22:08:20,601 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 22:08:20,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 22:08:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-12 22:08:20,606 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) [2021-06-12 22:08:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 22:08:20,607 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 22:08:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:20,607 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 22:08:20,607 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) [2021-06-12 22:08:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 22:08:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:20,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:20,608 INFO L472 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] [2021-06-12 22:08:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:20,821 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-12 22:08:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070676146] [2021-06-12 22:08:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070676146] [2021-06-12 22:08:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070676146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630391621] [2021-06-12 22:08:20,860 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 [2021-06-12 22:08:20,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:20,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630391621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:20,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:20,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:20,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372932180] [2021-06-12 22:08:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:20,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:20,969 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) [2021-06-12 22:08:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:21,305 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 22:08:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:08:21,306 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 [2021-06-12 22:08:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:21,308 INFO L225 Difference]: With dead ends: 619 [2021-06-12 22:08:21,308 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 22:08:21,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:08:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 22:08:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 22:08:21,314 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) [2021-06-12 22:08:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 22:08:21,315 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 22:08:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:21,316 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 22:08:21,316 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) [2021-06-12 22:08:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 22:08:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:21,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:21,316 INFO L472 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] [2021-06-12 22:08:21,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 22:08:21,533 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-12 22:08:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:21,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378483288] [2021-06-12 22:08:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:21,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:21,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378483288] [2021-06-12 22:08:21,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378483288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:21,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121223348] [2021-06-12 22:08:21,576 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 [2021-06-12 22:08:21,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121223348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:21,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:21,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893647153] [2021-06-12 22:08:21,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:21,701 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) [2021-06-12 22:08:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:22,380 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 22:08:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:08:22,380 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 [2021-06-12 22:08:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:22,384 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 22:08:22,384 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 22:08:22,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:08:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 22:08:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 22:08:22,395 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) [2021-06-12 22:08:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 22:08:22,397 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 22:08:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:22,397 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 22:08:22,397 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) [2021-06-12 22:08:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 22:08:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:22,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:22,400 INFO L472 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] [2021-06-12 22:08:22,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:22,623 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-12 22:08:22,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:22,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605521593] [2021-06-12 22:08:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:22,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:22,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605521593] [2021-06-12 22:08:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605521593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:22,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252063426] [2021-06-12 22:08:22,655 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 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 [2021-06-12 22:08:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:22,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252063426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:22,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:22,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:22,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193216157] [2021-06-12 22:08:22,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:22,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:22,772 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) [2021-06-12 22:08:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:23,374 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 22:08:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:08:23,374 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 [2021-06-12 22:08:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:23,378 INFO L225 Difference]: With dead ends: 951 [2021-06-12 22:08:23,378 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 22:08:23,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:08:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 22:08:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 22:08:23,386 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) [2021-06-12 22:08:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 22:08:23,387 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 22:08:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:23,387 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 22:08:23,387 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) [2021-06-12 22:08:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 22:08:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:23,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:23,388 INFO L472 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] [2021-06-12 22:08:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:23,601 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-12 22:08:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525778362] [2021-06-12 22:08:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:23,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:23,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525778362] [2021-06-12 22:08:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525778362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:23,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636450757] [2021-06-12 22:08:23,628 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 [2021-06-12 22:08:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:08:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:23,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636450757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:23,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:23,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:08:23,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645663423] [2021-06-12 22:08:23,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:08:23,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:08:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:08:23,701 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) [2021-06-12 22:08:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:23,802 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 22:08:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:08:23,802 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 [2021-06-12 22:08:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:23,811 INFO L225 Difference]: With dead ends: 669 [2021-06-12 22:08:23,811 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 22:08:23,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 22:08:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 22:08:23,819 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) [2021-06-12 22:08:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 22:08:23,820 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 22:08:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:23,820 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 22:08:23,820 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) [2021-06-12 22:08:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 22:08:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:23,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:23,822 INFO L472 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] [2021-06-12 22:08:24,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 22:08:24,038 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-12 22:08:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:24,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850040253] [2021-06-12 22:08:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:24,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:24,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850040253] [2021-06-12 22:08:24,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850040253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:24,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003338428] [2021-06-12 22:08:24,084 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 [2021-06-12 22:08:24,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:24,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003338428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:24,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:24,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:08:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927887884] [2021-06-12 22:08:24,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:24,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:24,192 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) [2021-06-12 22:08:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:24,353 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 22:08:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:08:24,354 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 [2021-06-12 22:08:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:24,356 INFO L225 Difference]: With dead ends: 710 [2021-06-12 22:08:24,356 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 22:08:24,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:08:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 22:08:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 22:08:24,364 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) [2021-06-12 22:08:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 22:08:24,365 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 22:08:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 22:08:24,365 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) [2021-06-12 22:08:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 22:08:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:24,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:24,366 INFO L472 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] [2021-06-12 22:08:24,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:24,581 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-12 22:08:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:24,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450545960] [2021-06-12 22:08:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:24,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450545960] [2021-06-12 22:08:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450545960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823960328] [2021-06-12 22:08:24,602 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 [2021-06-12 22:08:24,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:24,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:08:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823960328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:24,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:24,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:08:24,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380583768] [2021-06-12 22:08:24,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:08:24,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:08:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:08:24,710 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) [2021-06-12 22:08:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:24,794 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 22:08:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:08:24,795 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 [2021-06-12 22:08:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:24,798 INFO L225 Difference]: With dead ends: 830 [2021-06-12 22:08:24,798 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 22:08:24,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 22:08:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 22:08:24,809 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) [2021-06-12 22:08:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 22:08:24,811 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 22:08:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:24,811 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 22:08:24,811 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) [2021-06-12 22:08:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 22:08:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:24,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:24,812 INFO L472 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] [2021-06-12 22:08:25,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:25,031 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-12 22:08:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:25,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118181379] [2021-06-12 22:08:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118181379] [2021-06-12 22:08:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118181379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622999250] [2021-06-12 22:08:25,061 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 [2021-06-12 22:08:25,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:25,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:25,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622999250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:25,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:25,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:25,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030466698] [2021-06-12 22:08:25,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:25,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:25,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:25,157 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) [2021-06-12 22:08:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:25,432 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 22:08:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:08:25,432 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 [2021-06-12 22:08:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:25,437 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 22:08:25,437 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 22:08:25,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:08:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 22:08:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 22:08:25,449 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) [2021-06-12 22:08:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 22:08:25,451 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 22:08:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:25,451 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 22:08:25,451 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) [2021-06-12 22:08:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 22:08:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:25,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:25,452 INFO L472 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] [2021-06-12 22:08:25,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 22:08:25,668 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-12 22:08:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:25,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74676271] [2021-06-12 22:08:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:25,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:25,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74676271] [2021-06-12 22:08:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74676271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:25,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216665613] [2021-06-12 22:08:25,699 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 [2021-06-12 22:08:25,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:25,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216665613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140363683] [2021-06-12 22:08:25,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:25,804 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) [2021-06-12 22:08:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:26,216 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 22:08:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:08:26,216 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 [2021-06-12 22:08:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:26,221 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 22:08:26,221 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 22:08:26,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:08:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 22:08:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 22:08:26,239 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) [2021-06-12 22:08:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 22:08:26,240 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 22:08:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:26,241 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 22:08:26,241 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) [2021-06-12 22:08:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 22:08:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:26,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:26,242 INFO L472 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] [2021-06-12 22:08:26,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 22:08:26,449 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-12 22:08:26,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:26,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513198149] [2021-06-12 22:08:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:26,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:26,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513198149] [2021-06-12 22:08:26,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513198149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:26,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255285427] [2021-06-12 22:08:26,489 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 [2021-06-12 22:08:26,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:26,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255285427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:26,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:26,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:08:26,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050095874] [2021-06-12 22:08:26,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:26,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:26,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:26,616 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) [2021-06-12 22:08:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:26,829 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 22:08:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:08:26,830 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 [2021-06-12 22:08:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:26,834 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 22:08:26,834 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 22:08:26,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:08:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 22:08:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 22:08:26,847 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) [2021-06-12 22:08:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 22:08:26,848 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 22:08:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:26,848 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 22:08:26,848 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) [2021-06-12 22:08:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 22:08:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:26,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:26,850 INFO L472 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] [2021-06-12 22:08:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:08:27,065 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-12 22:08:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322024593] [2021-06-12 22:08:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:27,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:27,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322024593] [2021-06-12 22:08:27,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322024593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:27,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503332078] [2021-06-12 22:08:27,095 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 [2021-06-12 22:08:27,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:27,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503332078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:27,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:27,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:08:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109160666] [2021-06-12 22:08:27,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:27,203 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) [2021-06-12 22:08:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:27,425 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 22:08:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:08:27,426 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 [2021-06-12 22:08:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:27,430 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 22:08:27,430 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 22:08:27,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:08:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 22:08:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 22:08:27,443 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) [2021-06-12 22:08:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 22:08:27,445 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 22:08:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:27,445 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 22:08:27,445 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) [2021-06-12 22:08:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 22:08:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:27,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:27,446 INFO L472 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] [2021-06-12 22:08:27,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:27,665 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-12 22:08:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342209873] [2021-06-12 22:08:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:27,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:27,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342209873] [2021-06-12 22:08:27,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342209873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:27,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591550747] [2021-06-12 22:08:27,715 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 [2021-06-12 22:08:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:27,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591550747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:27,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:27,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:27,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271536417] [2021-06-12 22:08:27,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:27,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:27,791 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) [2021-06-12 22:08:28,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:28,114 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 22:08:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:08:28,114 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 [2021-06-12 22:08:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:28,119 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 22:08:28,119 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 22:08:28,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:08:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 22:08:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 22:08:28,134 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) [2021-06-12 22:08:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 22:08:28,136 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 22:08:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:28,136 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 22:08:28,136 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) [2021-06-12 22:08:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 22:08:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:28,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:28,138 INFO L472 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] [2021-06-12 22:08:28,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:28,355 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-12 22:08:28,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:28,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646374778] [2021-06-12 22:08:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:28,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646374778] [2021-06-12 22:08:28,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646374778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300133159] [2021-06-12 22:08:28,386 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 [2021-06-12 22:08:28,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:28,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300133159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:28,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:28,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301846521] [2021-06-12 22:08:28,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:28,513 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) [2021-06-12 22:08:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:29,191 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 22:08:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:08:29,192 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 [2021-06-12 22:08:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:29,201 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 22:08:29,201 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 22:08:29,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:08:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 22:08:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 22:08:29,225 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) [2021-06-12 22:08:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 22:08:29,226 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 22:08:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:29,227 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 22:08:29,227 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) [2021-06-12 22:08:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 22:08:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:29,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:29,228 INFO L472 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] [2021-06-12 22:08:29,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:29,429 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-12 22:08:29,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:29,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65482688] [2021-06-12 22:08:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:29,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65482688] [2021-06-12 22:08:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65482688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615635701] [2021-06-12 22:08:29,463 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 [2021-06-12 22:08:29,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:29,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615635701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:29,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:29,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:29,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072679444] [2021-06-12 22:08:29,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:29,571 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) [2021-06-12 22:08:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:30,204 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 22:08:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:08:30,204 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 [2021-06-12 22:08:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:30,212 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 22:08:30,212 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 22:08:30,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:08:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 22:08:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 22:08:30,235 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) [2021-06-12 22:08:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 22:08:30,237 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 22:08:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:30,237 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 22:08:30,237 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) [2021-06-12 22:08:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 22:08:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:30,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:30,239 INFO L472 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] [2021-06-12 22:08:30,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:08:30,454 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:30,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-12 22:08:30,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:30,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71591896] [2021-06-12 22:08:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:30,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:30,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71591896] [2021-06-12 22:08:30,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71591896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:30,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838470869] [2021-06-12 22:08:30,485 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 [2021-06-12 22:08:30,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:30,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:30,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838470869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:30,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:30,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:30,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350640657] [2021-06-12 22:08:30,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:30,591 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) [2021-06-12 22:08:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:31,200 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 22:08:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:08:31,201 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 [2021-06-12 22:08:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:31,208 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 22:08:31,208 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 22:08:31,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:08:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 22:08:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 22:08:31,232 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) [2021-06-12 22:08:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 22:08:31,234 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 22:08:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:31,234 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 22:08:31,234 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) [2021-06-12 22:08:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 22:08:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:31,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:31,237 INFO L472 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] [2021-06-12 22:08:31,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:08:31,449 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:31,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-12 22:08:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:31,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786150642] [2021-06-12 22:08:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:31,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786150642] [2021-06-12 22:08:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786150642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965444816] [2021-06-12 22:08:31,479 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 [2021-06-12 22:08:31,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:08:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:31,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965444816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:31,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:31,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:31,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783558979] [2021-06-12 22:08:31,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:31,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:31,558 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) [2021-06-12 22:08:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:32,044 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 22:08:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:08:32,044 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 [2021-06-12 22:08:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:32,060 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 22:08:32,061 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 22:08:32,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:08:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 22:08:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 22:08:32,092 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) [2021-06-12 22:08:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 22:08:32,094 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 22:08:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:32,094 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 22:08:32,094 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) [2021-06-12 22:08:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 22:08:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:32,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:32,096 INFO L472 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] [2021-06-12 22:08:32,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 22:08:32,312 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-12 22:08:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916677576] [2021-06-12 22:08:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:32,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916677576] [2021-06-12 22:08:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916677576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125945992] [2021-06-12 22:08:32,343 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 [2021-06-12 22:08:32,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:08:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:32,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125945992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:32,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:32,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:32,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997399993] [2021-06-12 22:08:32,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:32,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:32,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:32,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:32,436 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) [2021-06-12 22:08:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:33,009 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 22:08:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:08:33,010 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 [2021-06-12 22:08:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:33,014 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 22:08:33,014 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 22:08:33,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:08:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 22:08:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 22:08:33,034 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) [2021-06-12 22:08:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 22:08:33,036 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 22:08:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:33,036 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 22:08:33,036 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) [2021-06-12 22:08:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 22:08:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:33,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:33,038 INFO L472 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] [2021-06-12 22:08:33,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 22:08:33,253 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-12 22:08:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942275395] [2021-06-12 22:08:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:33,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942275395] [2021-06-12 22:08:33,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942275395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309359193] [2021-06-12 22:08:33,292 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 [2021-06-12 22:08:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:33,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:33,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309359193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:33,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:33,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:33,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960485984] [2021-06-12 22:08:33,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:33,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:33,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:33,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:33,384 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) [2021-06-12 22:08:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:33,916 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 22:08:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:08:33,916 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 [2021-06-12 22:08:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:33,920 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 22:08:33,920 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 22:08:33,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:08:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 22:08:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 22:08:33,940 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) [2021-06-12 22:08:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 22:08:33,942 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 22:08:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:33,942 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 22:08:33,942 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) [2021-06-12 22:08:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 22:08:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:33,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:33,944 INFO L472 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] [2021-06-12 22:08:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:08:34,157 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-12 22:08:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55928476] [2021-06-12 22:08:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:34,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:34,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55928476] [2021-06-12 22:08:34,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55928476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:34,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563123997] [2021-06-12 22:08:34,180 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 [2021-06-12 22:08:34,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:08:34,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:08:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563123997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:34,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:34,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:08:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18268651] [2021-06-12 22:08:34,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:08:34,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:34,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:08:34,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:08:34,242 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) [2021-06-12 22:08:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:34,309 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 22:08:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:08:34,310 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 [2021-06-12 22:08:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:34,311 INFO L225 Difference]: With dead ends: 929 [2021-06-12 22:08:34,311 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 22:08:34,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 22:08:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 22:08:34,321 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) [2021-06-12 22:08:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 22:08:34,322 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 22:08:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:34,323 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 22:08:34,323 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) [2021-06-12 22:08:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 22:08:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:34,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:34,324 INFO L472 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] [2021-06-12 22:08:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:34,540 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-12 22:08:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:34,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690239879] [2021-06-12 22:08:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:34,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:34,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690239879] [2021-06-12 22:08:34,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690239879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:34,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302426992] [2021-06-12 22:08:34,569 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 [2021-06-12 22:08:34,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:34,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:34,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:34,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302426992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:34,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:34,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:08:34,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791332397] [2021-06-12 22:08:34,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:08:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:08:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:08:34,635 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) [2021-06-12 22:08:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:34,900 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 22:08:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:08:34,901 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 [2021-06-12 22:08:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:34,903 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 22:08:34,904 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 22:08:34,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:08:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 22:08:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 22:08:34,915 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) [2021-06-12 22:08:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 22:08:34,917 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 22:08:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:34,917 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 22:08:34,917 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) [2021-06-12 22:08:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 22:08:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:34,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:34,919 INFO L472 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] [2021-06-12 22:08:35,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:35,132 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-12 22:08:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:35,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140364085] [2021-06-12 22:08:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:35,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:35,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140364085] [2021-06-12 22:08:35,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140364085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:35,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931548432] [2021-06-12 22:08:35,156 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 [2021-06-12 22:08:35,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:35,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:35,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931548432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:35,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:08:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927021686] [2021-06-12 22:08:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:08:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:08:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:08:35,224 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) [2021-06-12 22:08:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:35,452 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 22:08:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:08:35,452 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 [2021-06-12 22:08:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:35,455 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 22:08:35,455 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 22:08:35,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:08:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 22:08:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 22:08:35,470 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) [2021-06-12 22:08:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 22:08:35,472 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 22:08:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 22:08:35,472 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) [2021-06-12 22:08:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 22:08:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:35,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:35,473 INFO L472 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] [2021-06-12 22:08:35,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:35,693 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-12 22:08:35,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:35,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97726260] [2021-06-12 22:08:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:35,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:35,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97726260] [2021-06-12 22:08:35,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97726260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:35,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246223865] [2021-06-12 22:08:35,717 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 [2021-06-12 22:08:35,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:08:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246223865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:08:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479577891] [2021-06-12 22:08:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:08:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:08:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:08:35,808 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) [2021-06-12 22:08:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:35,976 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 22:08:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:08:35,976 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 [2021-06-12 22:08:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:35,979 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 22:08:35,979 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 22:08:35,979 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:08:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 22:08:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 22:08:35,991 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) [2021-06-12 22:08:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 22:08:35,993 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 22:08:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:35,993 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 22:08:35,993 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) [2021-06-12 22:08:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 22:08:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:35,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:35,994 INFO L472 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] [2021-06-12 22:08:36,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 22:08:36,197 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-12 22:08:36,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:36,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478659459] [2021-06-12 22:08:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:36,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478659459] [2021-06-12 22:08:36,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478659459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856083158] [2021-06-12 22:08:36,227 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 [2021-06-12 22:08:36,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856083158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:36,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:36,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:08:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379503032] [2021-06-12 22:08:36,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:08:36,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:08:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:08:36,291 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) [2021-06-12 22:08:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:36,479 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 22:08:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:08:36,479 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 [2021-06-12 22:08:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:36,482 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 22:08:36,482 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 22:08:36,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:08:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 22:08:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 22:08:36,494 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) [2021-06-12 22:08:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 22:08:36,496 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 22:08:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:36,496 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 22:08:36,496 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) [2021-06-12 22:08:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 22:08:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:36,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:36,498 INFO L472 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] [2021-06-12 22:08:36,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:36,714 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-12 22:08:36,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:36,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670851995] [2021-06-12 22:08:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:36,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:36,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670851995] [2021-06-12 22:08:36,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670851995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:36,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936873764] [2021-06-12 22:08:36,756 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 [2021-06-12 22:08:36,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:36,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936873764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:36,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:36,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140144717] [2021-06-12 22:08:36,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:36,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:36,873 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) [2021-06-12 22:08:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:37,337 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 22:08:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:08:37,337 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 [2021-06-12 22:08:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:37,340 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 22:08:37,340 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 22:08:37,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:08:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 22:08:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 22:08:37,360 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) [2021-06-12 22:08:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 22:08:37,362 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 22:08:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:37,362 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 22:08:37,362 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) [2021-06-12 22:08:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 22:08:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:37,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:37,364 INFO L472 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] [2021-06-12 22:08:37,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 22:08:37,577 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-12 22:08:37,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:37,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407789641] [2021-06-12 22:08:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:37,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407789641] [2021-06-12 22:08:37,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407789641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991297868] [2021-06-12 22:08:37,631 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 [2021-06-12 22:08:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:37,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991297868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:37,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:37,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396075811] [2021-06-12 22:08:37,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:37,740 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) [2021-06-12 22:08:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:38,161 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 22:08:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:08:38,162 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 [2021-06-12 22:08:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:38,175 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 22:08:38,175 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 22:08:38,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:08:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 22:08:38,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 22:08:38,192 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) [2021-06-12 22:08:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:08:38,194 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:08:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:38,194 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:08:38,194 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) [2021-06-12 22:08:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:08:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:38,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:38,196 INFO L472 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] [2021-06-12 22:08:38,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:38,412 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-12 22:08:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:38,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090553753] [2021-06-12 22:08:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:38,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090553753] [2021-06-12 22:08:38,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090553753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263022843] [2021-06-12 22:08:38,458 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 [2021-06-12 22:08:38,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:38,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263022843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:38,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:38,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:38,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430682077] [2021-06-12 22:08:38,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:38,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:38,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:38,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:38,553 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) [2021-06-12 22:08:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:38,906 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 22:08:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:08:38,907 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 [2021-06-12 22:08:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:38,910 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 22:08:38,910 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 22:08:38,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:08:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 22:08:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 22:08:38,926 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) [2021-06-12 22:08:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:08:38,927 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:08:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:38,928 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:08:38,928 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) [2021-06-12 22:08:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:08:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:38,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:38,929 INFO L472 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] [2021-06-12 22:08:39,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 22:08:39,137 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-12 22:08:39,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:39,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073223304] [2021-06-12 22:08:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:39,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:39,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073223304] [2021-06-12 22:08:39,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073223304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:39,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941684178] [2021-06-12 22:08:39,167 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 [2021-06-12 22:08:39,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:39,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941684178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:39,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:39,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:39,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651432902] [2021-06-12 22:08:39,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:39,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:39,264 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) [2021-06-12 22:08:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:39,588 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 22:08:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:08:39,588 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 [2021-06-12 22:08:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:39,591 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 22:08:39,591 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 22:08:39,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:08:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 22:08:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 22:08:39,606 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) [2021-06-12 22:08:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:08:39,608 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:08:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:39,608 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:08:39,608 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) [2021-06-12 22:08:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:08:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:39,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:39,610 INFO L472 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] [2021-06-12 22:08:39,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:39,825 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-12 22:08:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136847891] [2021-06-12 22:08:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:39,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136847891] [2021-06-12 22:08:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136847891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530752805] [2021-06-12 22:08:39,854 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 [2021-06-12 22:08:39,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:39,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:39,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530752805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:39,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:39,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987531672] [2021-06-12 22:08:39,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:39,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:39,951 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) [2021-06-12 22:08:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:40,319 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 22:08:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:08:40,319 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 [2021-06-12 22:08:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:40,322 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 22:08:40,322 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 22:08:40,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:08:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 22:08:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 22:08:40,337 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) [2021-06-12 22:08:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:08:40,339 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:08:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:40,339 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:08:40,339 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) [2021-06-12 22:08:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:08:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:40,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:40,340 INFO L472 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] [2021-06-12 22:08:40,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 22:08:40,541 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-12 22:08:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:40,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709700786] [2021-06-12 22:08:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:40,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709700786] [2021-06-12 22:08:40,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709700786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:40,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746274232] [2021-06-12 22:08:40,577 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 [2021-06-12 22:08:40,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:40,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746274232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963176873] [2021-06-12 22:08:40,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:40,664 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) [2021-06-12 22:08:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:41,017 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 22:08:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:08:41,017 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 [2021-06-12 22:08:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:41,020 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 22:08:41,020 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 22:08:41,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:08:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 22:08:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 22:08:41,035 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) [2021-06-12 22:08:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:08:41,037 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:08:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:41,037 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:08:41,037 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) [2021-06-12 22:08:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:08:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:41,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:41,038 INFO L472 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] [2021-06-12 22:08:41,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:08:41,249 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-12 22:08:41,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:41,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727751485] [2021-06-12 22:08:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:41,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:41,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727751485] [2021-06-12 22:08:41,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727751485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:41,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861180325] [2021-06-12 22:08:41,280 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 [2021-06-12 22:08:41,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:41,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861180325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:41,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:41,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:41,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607321004] [2021-06-12 22:08:41,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:41,357 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) [2021-06-12 22:08:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:41,664 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 22:08:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:08:41,665 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 [2021-06-12 22:08:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:41,667 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 22:08:41,667 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 22:08:41,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:08:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 22:08:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 22:08:41,693 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) [2021-06-12 22:08:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 22:08:41,695 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 22:08:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:41,695 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 22:08:41,695 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) [2021-06-12 22:08:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 22:08:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:41,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:41,697 INFO L472 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] [2021-06-12 22:08:41,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:41,897 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:41,898 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-12 22:08:41,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:41,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887736291] [2021-06-12 22:08:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:41,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887736291] [2021-06-12 22:08:41,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887736291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552193874] [2021-06-12 22:08:41,944 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 [2021-06-12 22:08:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:41,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:42,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552193874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:42,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:42,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:42,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645145472] [2021-06-12 22:08:42,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:42,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:42,011 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) [2021-06-12 22:08:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:42,258 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 22:08:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:08:42,258 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 [2021-06-12 22:08:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:42,260 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 22:08:42,260 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 22:08:42,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:08:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 22:08:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 22:08:42,278 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) [2021-06-12 22:08:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 22:08:42,280 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 22:08:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:42,280 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 22:08:42,280 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) [2021-06-12 22:08:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 22:08:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:42,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:42,282 INFO L472 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] [2021-06-12 22:08:42,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:42,497 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-12 22:08:42,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:42,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098718351] [2021-06-12 22:08:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:42,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098718351] [2021-06-12 22:08:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098718351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676451060] [2021-06-12 22:08:42,524 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 [2021-06-12 22:08:42,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676451060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:08:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478848128] [2021-06-12 22:08:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:08:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:08:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:08:42,608 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) [2021-06-12 22:08:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:42,815 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 22:08:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:08:42,816 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 [2021-06-12 22:08:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:42,818 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 22:08:42,818 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 22:08:42,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:08:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 22:08:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 22:08:42,833 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) [2021-06-12 22:08:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 22:08:42,835 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 22:08:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 22:08:42,836 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) [2021-06-12 22:08:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 22:08:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:42,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:42,837 INFO L472 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] [2021-06-12 22:08:43,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:43,038 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-12 22:08:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:43,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631363938] [2021-06-12 22:08:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:43,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:43,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631363938] [2021-06-12 22:08:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631363938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:43,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118698796] [2021-06-12 22:08:43,073 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 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 [2021-06-12 22:08:43,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:43,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118698796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:43,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:43,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385804562] [2021-06-12 22:08:43,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:43,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:43,174 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) [2021-06-12 22:08:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:43,469 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 22:08:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:08:43,469 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 [2021-06-12 22:08:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:43,472 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 22:08:43,472 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 22:08:43,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:08:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 22:08:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 22:08:43,487 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) [2021-06-12 22:08:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 22:08:43,489 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 22:08:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:43,489 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 22:08:43,489 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) [2021-06-12 22:08:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 22:08:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:43,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:43,491 INFO L472 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] [2021-06-12 22:08:43,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:43,707 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-12 22:08:43,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:43,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004666926] [2021-06-12 22:08:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:43,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:43,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004666926] [2021-06-12 22:08:43,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004666926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:43,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587646141] [2021-06-12 22:08:43,736 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 [2021-06-12 22:08:43,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:43,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:43,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:43,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:43,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587646141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:43,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:43,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:08:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743118868] [2021-06-12 22:08:43,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:08:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:08:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:08:43,841 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) [2021-06-12 22:08:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:44,086 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 22:08:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:08:44,087 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 [2021-06-12 22:08:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:44,089 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 22:08:44,089 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 22:08:44,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:08:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 22:08:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 22:08:44,102 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) [2021-06-12 22:08:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 22:08:44,104 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 22:08:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:44,104 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 22:08:44,104 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) [2021-06-12 22:08:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 22:08:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:08:44,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:44,106 INFO L472 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] [2021-06-12 22:08:44,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 22:08:44,306 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-12 22:08:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:44,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666831466] [2021-06-12 22:08:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:44,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666831466] [2021-06-12 22:08:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666831466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252430655] [2021-06-12 22:08:44,341 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 [2021-06-12 22:08:44,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:08:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:44,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252430655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:44,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:44,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:08:44,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930358069] [2021-06-12 22:08:44,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:08:44,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:08:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:08:44,417 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) [2021-06-12 22:08:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:44,574 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 22:08:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:08:44,574 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 [2021-06-12 22:08:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:44,576 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 22:08:44,576 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 22:08:44,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 22:08:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 22:08:44,590 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) [2021-06-12 22:08:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 22:08:44,592 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 22:08:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:44,592 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 22:08:44,592 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) [2021-06-12 22:08:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 22:08:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:44,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:44,593 INFO L472 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] [2021-06-12 22:08:44,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:44,813 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-12 22:08:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:44,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706012597] [2021-06-12 22:08:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:45,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:45,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706012597] [2021-06-12 22:08:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706012597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:45,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317494874] [2021-06-12 22:08:45,258 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 [2021-06-12 22:08:45,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:45,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:45,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:45,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:45,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:45,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,721 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 33 treesize of output 19 [2021-06-12 22:08:45,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:08:45,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,736 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 33 treesize of output 19 [2021-06-12 22:08:45,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:45,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:08:45,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:45,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:08:45,765 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:08:45,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:45,778 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:45,784 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:45,790 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:45,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:08:45,794 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:45,813 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:08:45,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:45,814 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-12 22:08:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:45,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317494874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:45,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:45,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:08:45,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168113831] [2021-06-12 22:08:45,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:08:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:08:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:45,837 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:46,526 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-12 22:08:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:08:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:46,529 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 22:08:46,529 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 22:08:46,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:08:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 22:08:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-12 22:08:46,542 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) [2021-06-12 22:08:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 22:08:46,544 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 22:08:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:46,544 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 22:08:46,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 22:08:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:46,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:46,546 INFO L472 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] [2021-06-12 22:08:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 22:08:46,753 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-12 22:08:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:46,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398978235] [2021-06-12 22:08:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:47,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:47,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398978235] [2021-06-12 22:08:47,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398978235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:47,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309879115] [2021-06-12 22:08:47,168 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 [2021-06-12 22:08:47,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:47,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:47,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:47,596 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-12 22:08:47,646 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-12 22:08:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:47,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:47,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:47,747 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-12 22:08:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:47,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:47,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:08:47,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:47,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:08:47,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:47,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:47,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:08:47,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:47,841 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-12 22:08:47,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:08:47,843 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-12 22:08:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:47,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309879115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:47,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:47,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:08:47,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518064323] [2021-06-12 22:08:47,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:08:47,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:08:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:08:47,895 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:49,219 INFO L93 Difference]: Finished difference Result 1616 states and 5213 transitions. [2021-06-12 22:08:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:08:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:49,221 INFO L225 Difference]: With dead ends: 1616 [2021-06-12 22:08:49,221 INFO L226 Difference]: Without dead ends: 1571 [2021-06-12 22:08:49,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1541.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:08:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-12 22:08:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1171. [2021-06-12 22:08:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-06-12 22:08:49,235 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-06-12 22:08:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:49,236 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-06-12 22:08:49,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-06-12 22:08:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:49,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:49,237 INFO L472 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] [2021-06-12 22:08:49,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:49,438 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-12 22:08:49,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:49,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316456410] [2021-06-12 22:08:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:49,775 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-12 22:08:49,900 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 22:08:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:49,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:49,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316456410] [2021-06-12 22:08:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316456410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163309895] [2021-06-12 22:08:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:08:49,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:08:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:50,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:08:50,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:08:50,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:08:50,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:08:50,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:08:50,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:08:50,541 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:08:50,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:08:50,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:08:50,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:08:50,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:08:50,581 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:08:50,589 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:08:50,597 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:08:50,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:08:50,609 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,626 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:08:50,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:50,628 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:08:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163309895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:50,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:50,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:08:50,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35920344] [2021-06-12 22:08:50,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:08:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:08:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:50,652 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:51,041 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-06-12 22:08:52,126 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-06-12 22:08:52,686 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 22:08:52,868 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 22:08:52,996 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-12 22:08:53,201 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 22:08:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:53,265 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-06-12 22:08:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:08:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:53,267 INFO L225 Difference]: With dead ends: 1671 [2021-06-12 22:08:53,267 INFO L226 Difference]: Without dead ends: 1656 [2021-06-12 22:08:53,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2761.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:08:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-12 22:08:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-06-12 22:08:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-06-12 22:08:53,282 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-06-12 22:08:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:53,282 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-06-12 22:08:53,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-06-12 22:08:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:53,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:53,284 INFO L472 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] [2021-06-12 22:08:53,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:53,485 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-12 22:08:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:53,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219989765] [2021-06-12 22:08:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:53,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:53,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219989765] [2021-06-12 22:08:53,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219989765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:53,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011096095] [2021-06-12 22:08:53,846 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 [2021-06-12 22:08:53,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:54,271 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9], 2=[A, v_prenex_7]} [2021-06-12 22:08:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:54,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,377 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-12 22:08:54,377 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-12 22:08:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:54,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:08:54,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:54,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:08:54,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:54,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:54,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-12 22:08:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011096095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:08:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112238371] [2021-06-12 22:08:54,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:08:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:08:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:54,460 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:55,603 INFO L93 Difference]: Finished difference Result 1703 states and 5445 transitions. [2021-06-12 22:08:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:08:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:55,606 INFO L225 Difference]: With dead ends: 1703 [2021-06-12 22:08:55,606 INFO L226 Difference]: Without dead ends: 1673 [2021-06-12 22:08:55,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:08:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-06-12 22:08:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1210. [2021-06-12 22:08:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.329197684036394) internal successors, (4025), 1209 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4025 transitions. [2021-06-12 22:08:55,620 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4025 transitions. Word has length 26 [2021-06-12 22:08:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:55,620 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4025 transitions. [2021-06-12 22:08:55,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4025 transitions. [2021-06-12 22:08:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:55,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:55,622 INFO L472 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] [2021-06-12 22:08:55,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 22:08:55,823 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-12 22:08:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:55,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608139736] [2021-06-12 22:08:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:56,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:56,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608139736] [2021-06-12 22:08:56,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608139736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599786765] [2021-06-12 22:08:56,194 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 [2021-06-12 22:08:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:08:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:56,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,788 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 30 treesize of output 16 [2021-06-12 22:08:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:08:56,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:08:56,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:08:56,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:08:56,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:08:56,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:08:56,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:08:56,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:08:56,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:08:56,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:08:56,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:08:56,886 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:08:56,894 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:08:56,902 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:56,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:08:56,907 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:56,924 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:08:56,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:56,926 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:08:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:56,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599786765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:56,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:56,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:08:56,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371939425] [2021-06-12 22:08:56,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:08:56,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:08:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:56,950 INFO L87 Difference]: Start difference. First operand 1210 states and 4025 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:58,890 INFO L93 Difference]: Finished difference Result 1830 states and 5830 transitions. [2021-06-12 22:08:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:08:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:58,893 INFO L225 Difference]: With dead ends: 1830 [2021-06-12 22:08:58,893 INFO L226 Difference]: Without dead ends: 1815 [2021-06-12 22:08:58,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1868.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:08:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-12 22:08:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1222. [2021-06-12 22:08:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3374283374283373) internal successors, (4075), 1221 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4075 transitions. [2021-06-12 22:08:58,909 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4075 transitions. Word has length 26 [2021-06-12 22:08:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:58,909 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4075 transitions. [2021-06-12 22:08:58,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4075 transitions. [2021-06-12 22:08:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:58,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:58,911 INFO L472 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] [2021-06-12 22:08:59,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 22:08:59,119 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-12 22:08:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13140276] [2021-06-12 22:08:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:59,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:59,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13140276] [2021-06-12 22:08:59,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13140276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:59,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745331470] [2021-06-12 22:08:59,574 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 [2021-06-12 22:08:59,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:08:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:00,220 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:09:00,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 47 [2021-06-12 22:09:00,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,263 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-12 22:09:00,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:09:00,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,299 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:09:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 30 [2021-06-12 22:09:00,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,340 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:09:00,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 40 [2021-06-12 22:09:00,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,386 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:09:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-12 22:09:00,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,415 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:09:00,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 1 [2021-06-12 22:09:00,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,453 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:09:00,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-12 22:09:00,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,506 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:09:00,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:09:00,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,557 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:09:00,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 47 [2021-06-12 22:09:00,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,603 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-12 22:09:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 38 [2021-06-12 22:09:00,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,624 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:09:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:09:00,625 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,647 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:09:00,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:09:00,648 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,691 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:09:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:09:00,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,769 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:09:00,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-06-12 22:09:00,791 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,825 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:09:00,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 40 [2021-06-12 22:09:00,845 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:00,858 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:09:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:09:00,859 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,288 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-12 22:09:01,289 INFO L628 ElimStorePlain]: treesize reduction 219, result has 60.0 percent of original size [2021-06-12 22:09:01,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 22:09:01,303 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:385 [2021-06-12 22:09:01,540 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-12 22:09:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:01,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745331470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:01,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:01,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:09:01,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438710222] [2021-06-12 22:09:01,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:09:01,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:09:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:09:01,650 INFO L87 Difference]: Start difference. First operand 1222 states and 4075 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:03,061 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-12 22:09:03,285 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-12 22:09:03,658 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-12 22:09:04,016 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-12 22:09:04,357 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-12 22:09:04,624 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-06-12 22:09:05,045 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-12 22:09:05,255 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-06-12 22:09:05,417 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-06-12 22:09:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:05,936 INFO L93 Difference]: Finished difference Result 2502 states and 7680 transitions. [2021-06-12 22:09:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:09:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:05,940 INFO L225 Difference]: With dead ends: 2502 [2021-06-12 22:09:05,940 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 22:09:05,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4471.8ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:09:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 22:09:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1394. [2021-06-12 22:09:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.3058147882268485) internal successors, (4605), 1393 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4605 transitions. [2021-06-12 22:09:05,959 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4605 transitions. Word has length 26 [2021-06-12 22:09:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:05,959 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 4605 transitions. [2021-06-12 22:09:05,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4605 transitions. [2021-06-12 22:09:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:05,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:05,961 INFO L472 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] [2021-06-12 22:09:06,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 22:09:06,167 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-12 22:09:06,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:06,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218294677] [2021-06-12 22:09:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:06,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218294677] [2021-06-12 22:09:06,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218294677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556176299] [2021-06-12 22:09:06,563 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 [2021-06-12 22:09:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:07,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:09:07,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:07,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:07,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:07,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:09:07,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,074 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,080 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:07,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,091 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:07,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:07,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:09:07,110 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,128 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:09:07,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:07,130 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-12 22:09:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556176299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:07,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:07,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:09:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485089603] [2021-06-12 22:09:07,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:07,152 INFO L87 Difference]: Start difference. First operand 1394 states and 4605 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:07,981 INFO L93 Difference]: Finished difference Result 1799 states and 5825 transitions. [2021-06-12 22:09:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:09:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:07,984 INFO L225 Difference]: With dead ends: 1799 [2021-06-12 22:09:07,984 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 22:09:07,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1077.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:09:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 22:09:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1405. [2021-06-12 22:09:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.3034188034188032) internal successors, (4638), 1404 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4638 transitions. [2021-06-12 22:09:08,002 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4638 transitions. Word has length 26 [2021-06-12 22:09:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:08,002 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 4638 transitions. [2021-06-12 22:09:08,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4638 transitions. [2021-06-12 22:09:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:08,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:08,004 INFO L472 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] [2021-06-12 22:09:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 22:09:08,220 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-12 22:09:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:08,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502645880] [2021-06-12 22:09:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502645880] [2021-06-12 22:09:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502645880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757151558] [2021-06-12 22:09:08,577 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 [2021-06-12 22:09:08,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:08,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:08,930 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-12 22:09:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,142 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:09:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 39 [2021-06-12 22:09:09,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:09,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,159 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-12 22:09:09,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 22:09:09,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:09,528 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-06-12 22:09:09,529 INFO L628 ElimStorePlain]: treesize reduction 100, result has 83.4 percent of original size [2021-06-12 22:09:09,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:09,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 36 [2021-06-12 22:09:09,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,573 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-12 22:09:09,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:09:09,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:09,718 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-12 22:09:09,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:09,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,749 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:09:09,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 22:09:09,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:09,912 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-12 22:09:09,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:09,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:09,933 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:09:09,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-12 22:09:09,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,076 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:09:10,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,094 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:09:10,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-12 22:09:10,096 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,229 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 22:09:10,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-12 22:09:10,252 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,377 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:09:10,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,398 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:09:10,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-12 22:09:10,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,534 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:09:10,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-06-12 22:09:10,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,566 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-12 22:09:10,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-06-12 22:09:10,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,772 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-12 22:09:10,772 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.5 percent of original size [2021-06-12 22:09:10,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:10,804 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:679, output treesize:449 [2021-06-12 22:09:11,016 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-12 22:09:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:11,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757151558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:11,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:11,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:11,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239236568] [2021-06-12 22:09:11,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:11,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:11,134 INFO L87 Difference]: Start difference. First operand 1405 states and 4638 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:12,182 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-12 22:09:12,331 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2021-06-12 22:09:12,560 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-12 22:09:12,933 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:09:13,128 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-12 22:09:13,368 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-12 22:09:13,741 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:09:14,300 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-06-12 22:09:14,614 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-06-12 22:09:14,802 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-12 22:09:15,392 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-12 22:09:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:15,874 INFO L93 Difference]: Finished difference Result 2194 states and 6873 transitions. [2021-06-12 22:09:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:09:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:15,877 INFO L225 Difference]: With dead ends: 2194 [2021-06-12 22:09:15,877 INFO L226 Difference]: Without dead ends: 2149 [2021-06-12 22:09:15,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4816.9ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:09:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-12 22:09:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1416. [2021-06-12 22:09:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.311660777385159) internal successors, (4686), 1415 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4686 transitions. [2021-06-12 22:09:15,896 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4686 transitions. Word has length 26 [2021-06-12 22:09:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:15,896 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4686 transitions. [2021-06-12 22:09:15,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4686 transitions. [2021-06-12 22:09:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:15,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:15,898 INFO L472 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] [2021-06-12 22:09:16,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-12 22:09:16,098 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-12 22:09:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80473102] [2021-06-12 22:09:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:16,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:16,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80473102] [2021-06-12 22:09:16,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80473102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:16,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9439173] [2021-06-12 22:09:16,278 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 [2021-06-12 22:09:16,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:16,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:09:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:16,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:16,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:16,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:09:16,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:16,954 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-06-12 22:09:16,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_32 vanished before elimination [2021-06-12 22:09:16,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:16,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:16,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:16,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:09:16,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:09:17,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-12 22:09:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:17,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9439173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:17,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:17,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:09:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104792846] [2021-06-12 22:09:17,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:17,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:17,041 INFO L87 Difference]: Start difference. First operand 1416 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:17,845 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 22:09:18,007 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-06-12 22:09:18,327 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-06-12 22:09:18,492 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-12 22:09:18,742 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-12 22:09:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:18,883 INFO L93 Difference]: Finished difference Result 2242 states and 7148 transitions. [2021-06-12 22:09:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:09:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:18,886 INFO L225 Difference]: With dead ends: 2242 [2021-06-12 22:09:18,886 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 22:09:18,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1866.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:09:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 22:09:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-06-12 22:09:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3217993079584773) internal successors, (4800), 1445 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4800 transitions. [2021-06-12 22:09:18,907 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4800 transitions. Word has length 26 [2021-06-12 22:09:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:18,907 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4800 transitions. [2021-06-12 22:09:18,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4800 transitions. [2021-06-12 22:09:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:18,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:18,909 INFO L472 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] [2021-06-12 22:09:19,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:19,125 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-12 22:09:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:19,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794023562] [2021-06-12 22:09:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:19,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794023562] [2021-06-12 22:09:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794023562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33636821] [2021-06-12 22:09:19,424 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 [2021-06-12 22:09:19,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:09:19,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:19,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:19,836 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:09:19,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:09:19,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,861 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:19,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,877 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:19,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,884 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,902 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:09:19,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:19,903 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-12 22:09:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:19,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33636821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:19,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:19,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:09:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878653739] [2021-06-12 22:09:19,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:09:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:09:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:09:19,929 INFO L87 Difference]: Start difference. First operand 1446 states and 4800 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) [2021-06-12 22:09:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:20,393 INFO L93 Difference]: Finished difference Result 1751 states and 5745 transitions. [2021-06-12 22:09:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:09:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:20,396 INFO L225 Difference]: With dead ends: 1751 [2021-06-12 22:09:20,396 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 22:09:20,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:09:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 22:09:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1455. [2021-06-12 22:09:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3259972489683634) internal successors, (4836), 1454 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4836 transitions. [2021-06-12 22:09:20,413 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4836 transitions. Word has length 26 [2021-06-12 22:09:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:20,413 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4836 transitions. [2021-06-12 22:09:20,413 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) [2021-06-12 22:09:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4836 transitions. [2021-06-12 22:09:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:20,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:20,415 INFO L472 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] [2021-06-12 22:09:20,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:20,621 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-06-12 22:09:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:20,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319390804] [2021-06-12 22:09:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:20,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319390804] [2021-06-12 22:09:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319390804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440647991] [2021-06-12 22:09:20,895 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 [2021-06-12 22:09:20,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:09:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:09:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,154 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,173 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:21,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:21,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:09:21,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,217 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,239 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:21,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:09:21,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:21,255 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,276 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:09:21,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,295 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,305 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,320 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,328 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:21,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:21,329 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:21,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:21,339 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,398 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-12 22:09:21,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:09:21,399 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-12 22:09:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440647991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:21,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:21,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:09:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644861030] [2021-06-12 22:09:21,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:21,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:21,505 INFO L87 Difference]: Start difference. First operand 1455 states and 4836 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:22,911 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-12 22:09:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:23,561 INFO L93 Difference]: Finished difference Result 2518 states and 8034 transitions. [2021-06-12 22:09:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:09:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:23,565 INFO L225 Difference]: With dead ends: 2518 [2021-06-12 22:09:23,565 INFO L226 Difference]: Without dead ends: 2488 [2021-06-12 22:09:23,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2010.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:09:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-12 22:09:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1471. [2021-06-12 22:09:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.336734693877551) internal successors, (4905), 1470 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4905 transitions. [2021-06-12 22:09:23,588 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4905 transitions. Word has length 26 [2021-06-12 22:09:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:23,588 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4905 transitions. [2021-06-12 22:09:23,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4905 transitions. [2021-06-12 22:09:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:23,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:23,590 INFO L472 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] [2021-06-12 22:09:23,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-12 22:09:23,791 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-06-12 22:09:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:23,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896985443] [2021-06-12 22:09:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:24,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:24,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896985443] [2021-06-12 22:09:24,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896985443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:24,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34236316] [2021-06-12 22:09:24,053 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 [2021-06-12 22:09:24,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:09:24,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:09:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 22:09:24,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 22:09:24,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 22:09:24,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,374 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:24,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:09:24,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,398 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:24,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:09:24,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:09:24,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,422 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 39 treesize of output 19 [2021-06-12 22:09:24,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:09:24,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:09:24,447 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,457 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:24,458 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:09:24,469 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 22:09:24,495 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,506 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:09:24,508 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-12 22:09:24,526 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:24,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:24,533 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,601 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-12 22:09:24,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:24,602 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-12 22:09:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:24,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34236316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:24,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:24,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:09:24,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930728970] [2021-06-12 22:09:24,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:24,686 INFO L87 Difference]: Start difference. First operand 1471 states and 4905 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:26,051 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-12 22:09:26,375 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-12 22:09:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:26,804 INFO L93 Difference]: Finished difference Result 2131 states and 6893 transitions. [2021-06-12 22:09:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:09:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:26,807 INFO L225 Difference]: With dead ends: 2131 [2021-06-12 22:09:26,807 INFO L226 Difference]: Without dead ends: 2101 [2021-06-12 22:09:26,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2040.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:09:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-06-12 22:09:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1480. [2021-06-12 22:09:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.342799188640974) internal successors, (4944), 1479 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 4944 transitions. [2021-06-12 22:09:26,828 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 4944 transitions. Word has length 26 [2021-06-12 22:09:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:26,828 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 4944 transitions. [2021-06-12 22:09:26,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 4944 transitions. [2021-06-12 22:09:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:26,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:26,830 INFO L472 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] [2021-06-12 22:09:27,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-12 22:09:27,031 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash -165503173, now seen corresponding path program 13 times [2021-06-12 22:09:27,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:27,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105357384] [2021-06-12 22:09:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:27,311 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-12 22:09:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:27,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105357384] [2021-06-12 22:09:27,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105357384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001094295] [2021-06-12 22:09:27,454 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 [2021-06-12 22:09:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:09:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:27,815 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_36], 2=[A, v_prenex_34]} [2021-06-12 22:09:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:27,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,918 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-12 22:09:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:09:27,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:27,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:09:27,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:27,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:27,967 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-12 22:09:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:27,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001094295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:27,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:27,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:09:27,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782592785] [2021-06-12 22:09:27,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:27,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:27,994 INFO L87 Difference]: Start difference. First operand 1480 states and 4944 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:28,837 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-12 22:09:29,007 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-12 22:09:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:29,321 INFO L93 Difference]: Finished difference Result 2125 states and 6803 transitions. [2021-06-12 22:09:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:09:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:29,324 INFO L225 Difference]: With dead ends: 2125 [2021-06-12 22:09:29,324 INFO L226 Difference]: Without dead ends: 2110 [2021-06-12 22:09:29,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1488.7ms TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:09:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-12 22:09:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1482. [2021-06-12 22:09:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.3430114787305873) internal successors, (4951), 1481 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4951 transitions. [2021-06-12 22:09:29,344 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4951 transitions. Word has length 26 [2021-06-12 22:09:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:29,344 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 4951 transitions. [2021-06-12 22:09:29,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4951 transitions. [2021-06-12 22:09:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:29,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:29,347 INFO L472 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] [2021-06-12 22:09:29,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-12 22:09:29,548 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-12 22:09:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:29,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977901993] [2021-06-12 22:09:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:29,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977901993] [2021-06-12 22:09:29,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977901993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482305658] [2021-06-12 22:09:29,819 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 [2021-06-12 22:09:29,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:29,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:09:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:09:30,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:09:30,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:30,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:30,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:09:30,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:09:30,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:09:30,431 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:09:30,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:09:30,448 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:09:30,457 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:09:30,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:09:30,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:09:30,480 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:09:30,487 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:09:30,496 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,514 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:09:30,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:30,515 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:09:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482305658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:30,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:30,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:09:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854898394] [2021-06-12 22:09:30,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:30,544 INFO L87 Difference]: Start difference. First operand 1482 states and 4951 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:31,227 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 22:09:31,649 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 22:09:32,238 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-12 22:09:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:33,522 INFO L93 Difference]: Finished difference Result 3327 states and 10302 transitions. [2021-06-12 22:09:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:09:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:33,527 INFO L225 Difference]: With dead ends: 3327 [2021-06-12 22:09:33,527 INFO L226 Difference]: Without dead ends: 3282 [2021-06-12 22:09:33,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2664.6ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:09:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-12 22:09:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1496. [2021-06-12 22:09:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3545150501672243) internal successors, (5015), 1495 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5015 transitions. [2021-06-12 22:09:33,555 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5015 transitions. Word has length 26 [2021-06-12 22:09:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:33,555 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5015 transitions. [2021-06-12 22:09:33,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5015 transitions. [2021-06-12 22:09:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:33,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:33,557 INFO L472 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] [2021-06-12 22:09:33,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-12 22:09:33,758 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1424367203, now seen corresponding path program 14 times [2021-06-12 22:09:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:33,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253165837] [2021-06-12 22:09:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:34,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:34,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253165837] [2021-06-12 22:09:34,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253165837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:34,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721735227] [2021-06-12 22:09:34,122 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 [2021-06-12 22:09:34,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:34,395 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-12 22:09:34,898 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:34,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,214 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 149 [2021-06-12 22:09:35,214 INFO L628 ElimStorePlain]: treesize reduction 201, result has 67.0 percent of original size [2021-06-12 22:09:35,235 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:35,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,379 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 22:09:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,380 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-12 22:09:35,402 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:35,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:35,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,548 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-12 22:09:35,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,569 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:35,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,706 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 22:09:35,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,726 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:09:35,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,863 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-12 22:09:35,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,886 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:35,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:09:35,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,028 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:09:36,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:09:36,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,177 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:09:36,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:09:36,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,333 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:09:36,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,353 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:36,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:09:36,357 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,490 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:09:36,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:36,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,636 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:09:36,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,654 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:36,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:36,658 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,791 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 22:09:36,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-12 22:09:36,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-12 22:09:36,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:09:36,805 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:455 [2021-06-12 22:09:37,027 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-06-12 22:09:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721735227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976940843] [2021-06-12 22:09:37,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:37,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:37,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:37,149 INFO L87 Difference]: Start difference. First operand 1496 states and 5015 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:37,561 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-12 22:09:37,853 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-12 22:09:38,012 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-12 22:09:38,422 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-12 22:09:38,861 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-12 22:09:39,295 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-12 22:09:39,877 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-12 22:09:40,294 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 22:09:40,862 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-06-12 22:09:41,472 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-12 22:09:41,736 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-12 22:09:41,928 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-06-12 22:09:42,270 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-06-12 22:09:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:42,578 INFO L93 Difference]: Finished difference Result 2583 states and 8123 transitions. [2021-06-12 22:09:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:09:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:42,581 INFO L225 Difference]: With dead ends: 2583 [2021-06-12 22:09:42,581 INFO L226 Difference]: Without dead ends: 2553 [2021-06-12 22:09:42,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5675.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:09:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-12 22:09:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1496. [2021-06-12 22:09:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3531772575250836) internal successors, (5013), 1495 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5013 transitions. [2021-06-12 22:09:42,613 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5013 transitions. Word has length 26 [2021-06-12 22:09:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:42,614 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5013 transitions. [2021-06-12 22:09:42,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5013 transitions. [2021-06-12 22:09:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:42,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:42,616 INFO L472 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] [2021-06-12 22:09:42,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:42,816 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 39724387, now seen corresponding path program 15 times [2021-06-12 22:09:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152185032] [2021-06-12 22:09:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:43,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152185032] [2021-06-12 22:09:43,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152185032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930793091] [2021-06-12 22:09:43,105 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 [2021-06-12 22:09:43,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:43,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:43,405 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-12 22:09:43,663 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:09:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:43,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:43,786 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 27 [2021-06-12 22:09:43,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:43,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:43,802 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 27 [2021-06-12 22:09:43,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,104 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2021-06-12 22:09:44,105 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.5 percent of original size [2021-06-12 22:09:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:44,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,246 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 22:09:44,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:44,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:44,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,384 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:09:44,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:09:44,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,523 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:09:44,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:44,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,648 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 22:09:44,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:44,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:44,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,771 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 22:09:44,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:09:44,786 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:09:44,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:44,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:44,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:44,982 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:158 [2021-06-12 22:09:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930793091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:45,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:45,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:09:45,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896674028] [2021-06-12 22:09:45,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:45,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:45,132 INFO L87 Difference]: Start difference. First operand 1496 states and 5013 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:46,203 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-12 22:09:46,675 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 22:09:47,066 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-12 22:09:47,389 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-12 22:09:47,930 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-12 22:09:48,313 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2021-06-12 22:09:48,792 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2021-06-12 22:09:49,288 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-12 22:09:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:49,401 INFO L93 Difference]: Finished difference Result 2835 states and 8886 transitions. [2021-06-12 22:09:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:09:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:49,405 INFO L225 Difference]: With dead ends: 2835 [2021-06-12 22:09:49,405 INFO L226 Difference]: Without dead ends: 2805 [2021-06-12 22:09:49,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4312.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:09:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-06-12 22:09:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1506. [2021-06-12 22:09:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.359468438538206) internal successors, (5056), 1505 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5056 transitions. [2021-06-12 22:09:49,429 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5056 transitions. Word has length 26 [2021-06-12 22:09:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:49,429 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5056 transitions. [2021-06-12 22:09:49,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5056 transitions. [2021-06-12 22:09:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:49,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:49,431 INFO L472 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] [2021-06-12 22:09:49,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:49,641 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-12 22:09:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51493590] [2021-06-12 22:09:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:49,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51493590] [2021-06-12 22:09:49,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51493590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347503298] [2021-06-12 22:09:49,886 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 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 [2021-06-12 22:09:49,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:09:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:09:50,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:09:50,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:09:50,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:50,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:09:50,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:09:50,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:09:50,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:09:50,472 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:09:50,481 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:09:50,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:09:50,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:09:50,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:09:50,529 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:09:50,536 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:09:50,541 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,560 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:09:50,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:50,561 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:09:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:50,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347503298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:50,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:50,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:09:50,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953849501] [2021-06-12 22:09:50,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:50,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:50,615 INFO L87 Difference]: Start difference. First operand 1506 states and 5056 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:51,424 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-12 22:09:51,910 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-12 22:09:52,105 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-12 22:09:52,348 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-12 22:09:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:53,455 INFO L93 Difference]: Finished difference Result 2978 states and 9427 transitions. [2021-06-12 22:09:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:09:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:53,459 INFO L225 Difference]: With dead ends: 2978 [2021-06-12 22:09:53,459 INFO L226 Difference]: Without dead ends: 2933 [2021-06-12 22:09:53,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2480.0ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:09:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-06-12 22:09:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1506. [2021-06-12 22:09:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.3601328903654486) internal successors, (5057), 1505 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5057 transitions. [2021-06-12 22:09:53,483 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5057 transitions. Word has length 26 [2021-06-12 22:09:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:53,484 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5057 transitions. [2021-06-12 22:09:53,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5057 transitions. [2021-06-12 22:09:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:53,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:53,486 INFO L472 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] [2021-06-12 22:09:53,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:53,705 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-12 22:09:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772447894] [2021-06-12 22:09:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:53,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:53,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772447894] [2021-06-12 22:09:53,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772447894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:53,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190751327] [2021-06-12 22:09:53,980 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 [2021-06-12 22:09:54,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:09:54,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:09:54,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,484 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:54,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:09:54,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,502 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:09:54,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 22:09:54,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,557 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:09:54,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,579 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:09:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-12 22:09:54,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,615 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:09:54,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 22:09:54,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,642 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-12 22:09:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-12 22:09:54,644 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,668 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:09:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-12 22:09:54,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,694 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:09:54,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 22:09:54,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,719 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:09:54,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-06-12 22:09:54,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,737 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:09:54,737 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,753 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:09:54,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,771 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:09:54,771 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,794 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:09:54,795 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,809 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:09:54,813 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:54,821 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:09:54,822 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:54,902 INFO L628 ElimStorePlain]: treesize reduction 66, result has 58.5 percent of original size [2021-06-12 22:09:54,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:54,904 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-12 22:09:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:54,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190751327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:54,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:54,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:09:54,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921304982] [2021-06-12 22:09:54,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:54,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:54,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:54,979 INFO L87 Difference]: Start difference. First operand 1506 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:55,755 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-12 22:09:56,825 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-12 22:09:57,497 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-12 22:09:57,680 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 22:09:57,802 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-06-12 22:09:57,979 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-12 22:09:58,153 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-06-12 22:09:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:58,543 INFO L93 Difference]: Finished difference Result 3558 states and 11107 transitions. [2021-06-12 22:09:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:09:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:58,548 INFO L225 Difference]: With dead ends: 3558 [2021-06-12 22:09:58,548 INFO L226 Difference]: Without dead ends: 3498 [2021-06-12 22:09:58,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3169.6ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:09:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-06-12 22:09:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 1522. [2021-06-12 22:09:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-12 22:09:58,577 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-12 22:09:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:58,577 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-12 22:09:58,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-12 22:09:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:58,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:58,580 INFO L472 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] [2021-06-12 22:09:58,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-12 22:09:58,780 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 16 times [2021-06-12 22:09:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:58,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842095366] [2021-06-12 22:09:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:59,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:59,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842095366] [2021-06-12 22:09:59,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842095366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:59,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96736451] [2021-06-12 22:09:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:09:59,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:59,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:59,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:59,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:09:59,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:59,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:59,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:59,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:59,580 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:59,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:59,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,603 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 30 treesize of output 13 [2021-06-12 22:09:59,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:59,609 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:09:59,615 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:59,629 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:59,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:09:59,633 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:59,654 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:09:59,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:59,655 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-12 22:09:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:59,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96736451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:59,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:59,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:09:59,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750142907] [2021-06-12 22:09:59,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:59,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:59,678 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:00,379 INFO L93 Difference]: Finished difference Result 1905 states and 6288 transitions. [2021-06-12 22:10:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:10:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:00,382 INFO L225 Difference]: With dead ends: 1905 [2021-06-12 22:10:00,382 INFO L226 Difference]: Without dead ends: 1890 [2021-06-12 22:10:00,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 957.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:10:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-12 22:10:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1530. [2021-06-12 22:10:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.368214519293656) internal successors, (5150), 1529 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5150 transitions. [2021-06-12 22:10:00,400 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5150 transitions. Word has length 26 [2021-06-12 22:10:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:00,400 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 5150 transitions. [2021-06-12 22:10:00,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5150 transitions. [2021-06-12 22:10:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:00,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:00,403 INFO L472 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] [2021-06-12 22:10:00,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1070,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:00,603 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1807218181, now seen corresponding path program 17 times [2021-06-12 22:10:00,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:00,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069886544] [2021-06-12 22:10:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069886544] [2021-06-12 22:10:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069886544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173698471] [2021-06-12 22:10:00,874 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 [2021-06-12 22:10:00,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:10:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:01,388 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-12 22:10:01,677 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-12 22:10:01,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:01,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:01,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:01,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:01,939 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-12 22:10:01,939 INFO L628 ElimStorePlain]: treesize reduction 55, result has 71.1 percent of original size [2021-06-12 22:10:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:01,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:01,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:01,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:01,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:10:01,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:02,011 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.2 percent of original size [2021-06-12 22:10:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:02,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:02,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:02,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:02,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:02,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:10:02,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:211, output treesize:25 [2021-06-12 22:10:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:02,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173698471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:02,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:02,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:10:02,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491271759] [2021-06-12 22:10:02,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:02,082 INFO L87 Difference]: Start difference. First operand 1530 states and 5150 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:02,828 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-12 22:10:03,237 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-12 22:10:03,504 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-12 22:10:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:03,784 INFO L93 Difference]: Finished difference Result 2016 states and 6558 transitions. [2021-06-12 22:10:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:10:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:03,788 INFO L225 Difference]: With dead ends: 2016 [2021-06-12 22:10:03,788 INFO L226 Difference]: Without dead ends: 1971 [2021-06-12 22:10:03,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2112.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:10:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-12 22:10:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1522. [2021-06-12 22:10:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-12 22:10:03,810 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-12 22:10:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:03,810 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-12 22:10:03,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-12 22:10:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:03,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:03,812 INFO L472 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] [2021-06-12 22:10:04,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-12 22:10:04,029 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 18 times [2021-06-12 22:10:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:04,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382151160] [2021-06-12 22:10:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:04,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:04,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382151160] [2021-06-12 22:10:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382151160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:04,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800697497] [2021-06-12 22:10:04,273 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 [2021-06-12 22:10:04,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:10:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:10:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:04,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:04,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:04,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,689 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:04,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,700 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:04,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,709 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:04,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:04,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,729 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:04,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,739 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:04,739 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:04,752 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,763 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:04,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:04,764 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:04,774 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,788 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:10:04,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:04,802 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:04,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,818 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:04,819 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:04,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:04,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:04,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:04,901 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.5 percent of original size [2021-06-12 22:10:04,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:04,904 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-06-12 22:10:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:04,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800697497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:04,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:04,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:10:04,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259881771] [2021-06-12 22:10:04,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:04,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:04,993 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:05,541 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-12 22:10:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:06,228 INFO L93 Difference]: Finished difference Result 1999 states and 6574 transitions. [2021-06-12 22:10:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:10:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:06,248 INFO L225 Difference]: With dead ends: 1999 [2021-06-12 22:10:06,248 INFO L226 Difference]: Without dead ends: 1984 [2021-06-12 22:10:06,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:10:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-12 22:10:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1516. [2021-06-12 22:10:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3716171617161717) internal successors, (5108), 1515 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5108 transitions. [2021-06-12 22:10:06,278 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5108 transitions. Word has length 26 [2021-06-12 22:10:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:06,278 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5108 transitions. [2021-06-12 22:10:06,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5108 transitions. [2021-06-12 22:10:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:06,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:06,280 INFO L472 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] [2021-06-12 22:10:06,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-12 22:10:06,481 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 19 times [2021-06-12 22:10:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:06,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985276166] [2021-06-12 22:10:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:06,802 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2021-06-12 22:10:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:07,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985276166] [2021-06-12 22:10:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985276166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427162631] [2021-06-12 22:10:07,038 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 [2021-06-12 22:10:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:10:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:07,379 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-12 22:10:07,600 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_133], 2=[A, v_prenex_132]} [2021-06-12 22:10:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:07,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:07,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:07,695 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-12 22:10:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:07,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:07,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:07,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:07,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:10:07,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:07,785 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-12 22:10:07,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:10:07,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-12 22:10:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:07,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427162631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:07,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:07,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:07,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076744138] [2021-06-12 22:10:07,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:07,821 INFO L87 Difference]: Start difference. First operand 1516 states and 5108 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:08,675 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:10:09,007 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-12 22:10:09,177 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-06-12 22:10:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:09,259 INFO L93 Difference]: Finished difference Result 2061 states and 6772 transitions. [2021-06-12 22:10:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:10:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:09,262 INFO L225 Difference]: With dead ends: 2061 [2021-06-12 22:10:09,262 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 22:10:09,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1952.3ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:10:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 22:10:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1517. [2021-06-12 22:10:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-06-12 22:10:09,281 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-06-12 22:10:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:09,281 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-06-12 22:10:09,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-06-12 22:10:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:09,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:09,283 INFO L472 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] [2021-06-12 22:10:09,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:09,484 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:09,484 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 20 times [2021-06-12 22:10:09,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:09,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272358839] [2021-06-12 22:10:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:09,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:09,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272358839] [2021-06-12 22:10:09,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272358839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:09,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222383401] [2021-06-12 22:10:09,730 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 [2021-06-12 22:10:09,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:10:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:10,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:10:10,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,437 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:10,437 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:10:10,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,557 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:10:10,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,579 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:10,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:10:10,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,599 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:10,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:10:10,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,715 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 22:10:10,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,736 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:10,736 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:10:10,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,754 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:10:10,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,887 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 22:10:10,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:10,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:10:10,911 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:10,926 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:10,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:10:10,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:11,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:11,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:11,038 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:224 [2021-06-12 22:10:11,206 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-06-12 22:10:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222383401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:11,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:10:11,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428614296] [2021-06-12 22:10:11,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:11,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:11,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:11,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:11,245 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:13,052 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-12 22:10:13,232 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-12 22:10:13,358 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 22:10:13,514 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-12 22:10:13,705 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-12 22:10:13,933 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-12 22:10:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:14,112 INFO L93 Difference]: Finished difference Result 2205 states and 7070 transitions. [2021-06-12 22:10:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:10:14,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:14,116 INFO L225 Difference]: With dead ends: 2205 [2021-06-12 22:10:14,116 INFO L226 Difference]: Without dead ends: 2165 [2021-06-12 22:10:14,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3046.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:10:14,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-06-12 22:10:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1566. [2021-06-12 22:10:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3686900958466452) internal successors, (5272), 1565 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5272 transitions. [2021-06-12 22:10:14,138 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5272 transitions. Word has length 26 [2021-06-12 22:10:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:14,138 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5272 transitions. [2021-06-12 22:10:14,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5272 transitions. [2021-06-12 22:10:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:14,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:14,140 INFO L472 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] [2021-06-12 22:10:14,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:14,356 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:14,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 21 times [2021-06-12 22:10:14,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:14,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482665813] [2021-06-12 22:10:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:14,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482665813] [2021-06-12 22:10:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482665813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772384998] [2021-06-12 22:10:14,556 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 [2021-06-12 22:10:14,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:10:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:15,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:15,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:10:15,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:15,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:10:15,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,084 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:15,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,094 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:15,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,102 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:15,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,112 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:15,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,132 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:15,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:10:15,135 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,155 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:10:15,157 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,174 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:10:15,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,186 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:15,187 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,213 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:10:15,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,226 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 1 [2021-06-12 22:10:15,227 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,241 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:15,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:10:15,243 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,251 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:15,252 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,259 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:15,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,264 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:15,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:15,265 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:15,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:15,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:10:15,325 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-12 22:10:15,462 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 22:10:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:15,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772384998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:15,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:15,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:10:15,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219025956] [2021-06-12 22:10:15,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:15,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:15,616 INFO L87 Difference]: Start difference. First operand 1566 states and 5272 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:16,393 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 22:10:16,519 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-12 22:10:17,067 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 22:10:17,239 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-12 22:10:17,615 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-12 22:10:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:17,790 INFO L93 Difference]: Finished difference Result 2352 states and 7640 transitions. [2021-06-12 22:10:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:10:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:17,800 INFO L225 Difference]: With dead ends: 2352 [2021-06-12 22:10:17,800 INFO L226 Difference]: Without dead ends: 2327 [2021-06-12 22:10:17,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2199.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:10:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-06-12 22:10:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1537. [2021-06-12 22:10:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.373046875) internal successors, (5181), 1536 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5181 transitions. [2021-06-12 22:10:17,822 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5181 transitions. Word has length 26 [2021-06-12 22:10:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:17,822 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5181 transitions. [2021-06-12 22:10:17,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5181 transitions. [2021-06-12 22:10:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:17,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:17,824 INFO L472 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] [2021-06-12 22:10:18,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1258 [2021-06-12 22:10:18,025 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-06-12 22:10:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411126236] [2021-06-12 22:10:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:18,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411126236] [2021-06-12 22:10:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411126236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514753505] [2021-06-12 22:10:18,199 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 [2021-06-12 22:10:18,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:10:18,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:18,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:18,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:10:18,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:10:18,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,538 INFO L628 ElimStorePlain]: treesize reduction 108, result has 42.2 percent of original size [2021-06-12 22:10:18,538 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-12 22:10:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:18,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:18,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:18,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:18,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:10:18,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:24 [2021-06-12 22:10:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:18,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514753505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:18,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:18,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:10:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316881403] [2021-06-12 22:10:18,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:10:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:18,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:10:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:10:18,617 INFO L87 Difference]: Start difference. First operand 1537 states and 5181 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) [2021-06-12 22:10:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:18,952 INFO L93 Difference]: Finished difference Result 1678 states and 5570 transitions. [2021-06-12 22:10:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:10:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:18,954 INFO L225 Difference]: With dead ends: 1678 [2021-06-12 22:10:18,954 INFO L226 Difference]: Without dead ends: 1663 [2021-06-12 22:10:18,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-06-12 22:10:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1561. [2021-06-12 22:10:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.3705128205128205) internal successors, (5258), 1560 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5258 transitions. [2021-06-12 22:10:18,973 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5258 transitions. Word has length 26 [2021-06-12 22:10:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:18,973 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 5258 transitions. [2021-06-12 22:10:18,973 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) [2021-06-12 22:10:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5258 transitions. [2021-06-12 22:10:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:18,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:18,975 INFO L472 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] [2021-06-12 22:10:19,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:19,176 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-06-12 22:10:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:19,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392624425] [2021-06-12 22:10:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:19,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:19,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392624425] [2021-06-12 22:10:19,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392624425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:19,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475774904] [2021-06-12 22:10:19,368 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 [2021-06-12 22:10:19,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:10:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:19,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:19,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,614 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:19,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:19,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:19,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,636 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:19,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:19,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:10:19,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,657 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:19,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:19,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,679 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:10:19,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:19,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:19,693 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:19,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:19,713 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,722 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:19,723 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,732 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:19,733 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,740 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:19,741 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,749 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:10:19,750 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:19,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:19,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,827 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-12 22:10:19,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:19,828 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-12 22:10:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:19,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475774904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:19,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:19,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:10:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001013016] [2021-06-12 22:10:19,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:19,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:19,923 INFO L87 Difference]: Start difference. First operand 1561 states and 5258 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:20,806 INFO L93 Difference]: Finished difference Result 2101 states and 6894 transitions. [2021-06-12 22:10:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:10:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:20,810 INFO L225 Difference]: With dead ends: 2101 [2021-06-12 22:10:20,810 INFO L226 Difference]: Without dead ends: 2076 [2021-06-12 22:10:20,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 927.3ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:10:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-12 22:10:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1550. [2021-06-12 22:10:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.378954163976759) internal successors, (5234), 1549 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5234 transitions. [2021-06-12 22:10:20,830 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5234 transitions. Word has length 26 [2021-06-12 22:10:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:20,830 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5234 transitions. [2021-06-12 22:10:20,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5234 transitions. [2021-06-12 22:10:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:20,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:20,832 INFO L472 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] [2021-06-12 22:10:21,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:21,033 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-06-12 22:10:21,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:21,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295274013] [2021-06-12 22:10:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:21,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295274013] [2021-06-12 22:10:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295274013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229467676] [2021-06-12 22:10:21,352 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 [2021-06-12 22:10:21,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:10:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:10:21,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:21,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,626 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:21,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,635 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:21,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:21,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 22:10:21,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,654 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:21,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:21,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,676 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 28 treesize of output 1 [2021-06-12 22:10:21,677 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,689 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:10:21,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,701 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:10:21,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,713 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 19 [2021-06-12 22:10:21,714 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,724 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-12 22:10:21,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:10:21,736 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:21,746 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:21,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:21,760 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:21,768 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:21,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-12 22:10:21,768 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:21,846 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-12 22:10:21,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:10:21,847 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-12 22:10:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:21,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229467676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:21,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:21,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:10:21,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919375850] [2021-06-12 22:10:21,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:21,940 INFO L87 Difference]: Start difference. First operand 1550 states and 5234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:23,187 INFO L93 Difference]: Finished difference Result 2118 states and 6970 transitions. [2021-06-12 22:10:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:10:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:23,192 INFO L225 Difference]: With dead ends: 2118 [2021-06-12 22:10:23,192 INFO L226 Difference]: Without dead ends: 2084 [2021-06-12 22:10:23,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1307.7ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:10:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-06-12 22:10:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1569. [2021-06-12 22:10:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3832908163265305) internal successors, (5305), 1568 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5305 transitions. [2021-06-12 22:10:23,211 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5305 transitions. Word has length 26 [2021-06-12 22:10:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:23,212 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 5305 transitions. [2021-06-12 22:10:23,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5305 transitions. [2021-06-12 22:10:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:23,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:23,214 INFO L472 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] [2021-06-12 22:10:23,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-12 22:10:23,414 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-06-12 22:10:23,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:23,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211388815] [2021-06-12 22:10:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:23,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:23,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211388815] [2021-06-12 22:10:23,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211388815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:23,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382602554] [2021-06-12 22:10:23,772 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 [2021-06-12 22:10:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,340 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:24,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:24,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:24,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:10:24,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,717 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-06-12 22:10:24,717 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-06-12 22:10:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,738 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:24,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:10:24,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:24,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:10:24,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,920 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 22:10:24,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,948 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:24,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:10:24,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,976 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:10:24,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:25,129 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 22:10:25,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:25,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:10:25,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:25,167 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:10:25,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:25,436 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-12 22:10:25,437 INFO L628 ElimStorePlain]: treesize reduction 16, result has 95.3 percent of original size [2021-06-12 22:10:25,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:25,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:10:25,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:25,472 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:10:25,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:25,715 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 22:10:25,715 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-12 22:10:25,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:10:25,733 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:253 [2021-06-12 22:10:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:25,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382602554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:25,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:25,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:25,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243314888] [2021-06-12 22:10:25,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:25,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:25,882 INFO L87 Difference]: Start difference. First operand 1569 states and 5305 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:26,388 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-12 22:10:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:27,095 INFO L93 Difference]: Finished difference Result 2132 states and 7032 transitions. [2021-06-12 22:10:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:10:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:27,098 INFO L225 Difference]: With dead ends: 2132 [2021-06-12 22:10:27,098 INFO L226 Difference]: Without dead ends: 2107 [2021-06-12 22:10:27,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1500.7ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:10:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-12 22:10:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1575. [2021-06-12 22:10:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3818297331639138) internal successors, (5323), 1574 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5323 transitions. [2021-06-12 22:10:27,117 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5323 transitions. Word has length 26 [2021-06-12 22:10:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:27,118 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 5323 transitions. [2021-06-12 22:10:27,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5323 transitions. [2021-06-12 22:10:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:27,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:27,120 INFO L472 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] [2021-06-12 22:10:27,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:27,340 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-12 22:10:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370475153] [2021-06-12 22:10:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370475153] [2021-06-12 22:10:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370475153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140085161] [2021-06-12 22:10:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:27,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:10:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:28,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:10:28,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:10:28,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:10:28,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:10:28,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:10:28,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:10:28,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:10:28,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:10:28,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:10:28,263 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:10:28,271 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:10:28,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:10:28,284 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:10:28,291 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:10:28,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:10:28,305 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,323 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:10:28,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:10:28,324 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:10:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:28,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140085161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:28,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:28,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:10:28,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594380817] [2021-06-12 22:10:28,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:28,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:28,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:28,346 INFO L87 Difference]: Start difference. First operand 1575 states and 5323 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:29,340 INFO L93 Difference]: Finished difference Result 2018 states and 6640 transitions. [2021-06-12 22:10:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:10:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:29,343 INFO L225 Difference]: With dead ends: 2018 [2021-06-12 22:10:29,343 INFO L226 Difference]: Without dead ends: 1992 [2021-06-12 22:10:29,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:10:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-12 22:10:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1579. [2021-06-12 22:10:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-12 22:10:29,362 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-12 22:10:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:29,363 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-12 22:10:29,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-12 22:10:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:29,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:29,365 INFO L472 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] [2021-06-12 22:10:29,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:29,578 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-12 22:10:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:29,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594765825] [2021-06-12 22:10:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:29,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:29,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594765825] [2021-06-12 22:10:29,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594765825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:29,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895923151] [2021-06-12 22:10:29,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:29,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:10:29,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:30,222 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_163], 5=[v_prenex_165, v_prenex_167]} [2021-06-12 22:10:30,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:30,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:30,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:30,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:30,307 INFO L628 ElimStorePlain]: treesize reduction 135, result has 43.3 percent of original size [2021-06-12 22:10:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:30,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:30,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:30,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:30,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:10:30,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:30,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:10:30,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:30,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:30,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:10:30,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:24 [2021-06-12 22:10:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895923151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:30,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:30,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:10:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524612577] [2021-06-12 22:10:30,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:30,421 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:31,992 INFO L93 Difference]: Finished difference Result 2235 states and 7337 transitions. [2021-06-12 22:10:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:10:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:31,996 INFO L225 Difference]: With dead ends: 2235 [2021-06-12 22:10:31,996 INFO L226 Difference]: Without dead ends: 2220 [2021-06-12 22:10:31,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1622.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:10:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-12 22:10:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1579. [2021-06-12 22:10:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-12 22:10:32,017 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-12 22:10:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:32,017 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-12 22:10:32,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-12 22:10:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:32,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:32,019 INFO L472 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] [2021-06-12 22:10:32,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-06-12 22:10:32,220 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-06-12 22:10:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:32,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100492792] [2021-06-12 22:10:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:32,453 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-12 22:10:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:32,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100492792] [2021-06-12 22:10:32,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100492792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536887406] [2021-06-12 22:10:32,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:32,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:10:32,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:32,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:10:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:10:32,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:32,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:32,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,861 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:32,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,874 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:32,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 22:10:32,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:32,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,894 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:32,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:10:32,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:10:32,915 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,925 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:10:32,926 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,934 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-12 22:10:32,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-12 22:10:32,944 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,952 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,952 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 1 [2021-06-12 22:10:32,953 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:32,965 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:32,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:32,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:10:32,982 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 1 [2021-06-12 22:10:32,983 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:33,047 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-12 22:10:33,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:10:33,048 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-12 22:10:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536887406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:33,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:33,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:10:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741890391] [2021-06-12 22:10:33,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:33,123 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:33,609 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-12 22:10:34,129 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 22:10:34,294 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-12 22:10:34,431 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-12 22:10:34,641 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-12 22:10:34,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-12 22:10:35,143 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-12 22:10:35,361 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-12 22:10:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:35,403 INFO L93 Difference]: Finished difference Result 2244 states and 7303 transitions. [2021-06-12 22:10:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:10:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:35,406 INFO L225 Difference]: With dead ends: 2244 [2021-06-12 22:10:35,406 INFO L226 Difference]: Without dead ends: 2225 [2021-06-12 22:10:35,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2265.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:10:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-12 22:10:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1598. [2021-06-12 22:10:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.3844708829054477) internal successors, (5405), 1597 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5405 transitions. [2021-06-12 22:10:35,432 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5405 transitions. Word has length 26 [2021-06-12 22:10:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:35,433 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5405 transitions. [2021-06-12 22:10:35,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5405 transitions. [2021-06-12 22:10:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:35,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:35,435 INFO L472 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] [2021-06-12 22:10:35,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:35,635 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-12 22:10:35,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:35,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981483158] [2021-06-12 22:10:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:35,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981483158] [2021-06-12 22:10:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981483158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92840130] [2021-06-12 22:10:35,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:36,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:10:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:10:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,496 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-12 22:10:36,496 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 33 treesize of output 41 [2021-06-12 22:10:36,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,521 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-12 22:10:36,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-06-12 22:10:36,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,555 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 22:10:36,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 22:10:36,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,582 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:10:36,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-12 22:10:36,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,607 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:10:36,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:10:36,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,627 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:10:36,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,641 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:10:36,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,656 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:10:36,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,671 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:10:36,672 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,686 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:10:36,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,701 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:10:36,702 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,732 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:36,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,793 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:10:36,805 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:36,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 22:10:36,843 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,856 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:36,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:36,864 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:10:36,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:36,866 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,004 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-06-12 22:10:37,004 INFO L628 ElimStorePlain]: treesize reduction 34, result has 75.2 percent of original size [2021-06-12 22:10:37,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:10:37,006 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:75 [2021-06-12 22:10:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:37,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92840130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:37,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:37,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 22:10:37,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399463879] [2021-06-12 22:10:37,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:10:37,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:37,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:10:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:10:37,074 INFO L87 Difference]: Start difference. First operand 1598 states and 5405 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-06-12 22:10:38,940 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-12 22:10:39,071 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 22:10:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:39,377 INFO L93 Difference]: Finished difference Result 2476 states and 7899 transitions. [2021-06-12 22:10:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:10:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:39,380 INFO L225 Difference]: With dead ends: 2476 [2021-06-12 22:10:39,381 INFO L226 Difference]: Without dead ends: 2432 [2021-06-12 22:10:39,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2199.0ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:10:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-12 22:10:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1605. [2021-06-12 22:10:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.385286783042394) internal successors, (5430), 1604 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5430 transitions. [2021-06-12 22:10:39,403 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5430 transitions. Word has length 26 [2021-06-12 22:10:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:39,403 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5430 transitions. [2021-06-12 22:10:39,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-06-12 22:10:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5430 transitions. [2021-06-12 22:10:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:39,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:39,405 INFO L472 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] [2021-06-12 22:10:39,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-06-12 22:10:39,605 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-12 22:10:39,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:39,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362584018] [2021-06-12 22:10:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:39,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362584018] [2021-06-12 22:10:39,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362584018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944024734] [2021-06-12 22:10:39,810 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 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 [2021-06-12 22:10:39,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:10:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,431 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:40,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:10:40,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,484 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:40,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-06-12 22:10:40,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,507 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:40,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,552 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:10:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 22:10:40,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,604 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 47 [2021-06-12 22:10:40,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,648 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:40,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:10:40,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,675 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,676 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:10:40,676 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,719 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:10:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:10:40,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,745 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:40,746 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,794 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:10:40,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-06-12 22:10:40,801 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,850 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:10:40,851 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 37 treesize of output 55 [2021-06-12 22:10:40,858 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,890 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:40,891 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,918 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:40,919 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,957 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 22:10:40,967 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:40,985 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:10:40,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:40,986 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:40,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:41,016 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:10:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:10:41,022 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:41,423 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-06-12 22:10:41,423 INFO L628 ElimStorePlain]: treesize reduction 198, result has 63.1 percent of original size [2021-06-12 22:10:41,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:41,431 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:413 [2021-06-12 22:10:41,652 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 22:10:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:41,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944024734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:41,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:41,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:10:41,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702508552] [2021-06-12 22:10:41,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:10:41,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:10:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:10:41,805 INFO L87 Difference]: Start difference. First operand 1605 states and 5430 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:44,289 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 22:10:44,935 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-12 22:10:45,121 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 22:10:45,434 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-12 22:10:45,586 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 22:10:45,735 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-12 22:10:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:45,968 INFO L93 Difference]: Finished difference Result 3600 states and 11338 transitions. [2021-06-12 22:10:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:10:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:45,974 INFO L225 Difference]: With dead ends: 3600 [2021-06-12 22:10:45,974 INFO L226 Difference]: Without dead ends: 3564 [2021-06-12 22:10:45,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3913.7ms TimeCoverageRelationStatistics Valid=893, Invalid=4959, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:10:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-12 22:10:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 1759. [2021-06-12 22:10:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.4044368600682593) internal successors, (5985), 1758 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5985 transitions. [2021-06-12 22:10:46,007 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5985 transitions. Word has length 26 [2021-06-12 22:10:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:46,007 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 5985 transitions. [2021-06-12 22:10:46,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5985 transitions. [2021-06-12 22:10:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:46,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:46,010 INFO L472 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] [2021-06-12 22:10:46,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-06-12 22:10:46,210 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-12 22:10:46,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:46,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492300841] [2021-06-12 22:10:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:46,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492300841] [2021-06-12 22:10:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492300841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702908450] [2021-06-12 22:10:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:10:46,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:10:46,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 22:10:46,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:46,871 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 22:10:47,285 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_183, v_prenex_187], 6=[A, v_prenex_185]} [2021-06-12 22:10:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:47,292 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 21 treesize of output 13 [2021-06-12 22:10:47,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:47,407 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 22:10:47,408 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-06-12 22:10:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:47,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:47,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:47,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:47,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-12 22:10:47,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:47,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:47,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:47,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:47,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:47,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:47,517 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:31 [2021-06-12 22:10:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:47,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702908450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:47,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:47,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:10:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987144967] [2021-06-12 22:10:47,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:47,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:47,554 INFO L87 Difference]: Start difference. First operand 1759 states and 5985 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:48,677 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 58 [2021-06-12 22:10:48,939 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:10:49,349 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-12 22:10:49,526 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 22:10:49,850 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 102 [2021-06-12 22:10:50,019 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:10:50,276 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2021-06-12 22:10:50,575 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-12 22:10:50,898 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-06-12 22:10:51,126 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 74 [2021-06-12 22:10:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:51,337 INFO L93 Difference]: Finished difference Result 3623 states and 11573 transitions. [2021-06-12 22:10:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:10:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:51,342 INFO L225 Difference]: With dead ends: 3623 [2021-06-12 22:10:51,342 INFO L226 Difference]: Without dead ends: 3587 [2021-06-12 22:10:51,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3510.7ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:10:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-06-12 22:10:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 1939. [2021-06-12 22:10:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4262125902992775) internal successors, (6640), 1938 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6640 transitions. [2021-06-12 22:10:51,373 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6640 transitions. Word has length 26 [2021-06-12 22:10:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:51,373 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6640 transitions. [2021-06-12 22:10:51,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6640 transitions. [2021-06-12 22:10:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:51,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:51,375 INFO L472 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] [2021-06-12 22:10:51,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:51,591 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-12 22:10:51,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:51,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382064175] [2021-06-12 22:10:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:51,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382064175] [2021-06-12 22:10:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382064175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866202945] [2021-06-12 22:10:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:51,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:10:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:10:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,278 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:10:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 22:10:52,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,305 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:10:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:10:52,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,324 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:10:52,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,347 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:10:52,348 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 28 treesize of output 30 [2021-06-12 22:10:52,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,374 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:10:52,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-12 22:10:52,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:52,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-12 22:10:52,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,418 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:10:52,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,432 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:10:52,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,447 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:10:52,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,462 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:10:52,462 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,478 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 22:10:52,479 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,492 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:10:52,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 22:10:52,521 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,535 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-12 22:10:52,535 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,548 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:10:52,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,556 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:10:52,557 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,669 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-12 22:10:52,670 INFO L628 ElimStorePlain]: treesize reduction 56, result has 59.1 percent of original size [2021-06-12 22:10:52,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:52,672 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-06-12 22:10:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:52,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866202945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:52,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:52,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:10:52,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017426580] [2021-06-12 22:10:52,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:52,753 INFO L87 Difference]: Start difference. First operand 1939 states and 6640 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:55,022 INFO L93 Difference]: Finished difference Result 4085 states and 13117 transitions. [2021-06-12 22:10:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:10:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:55,028 INFO L225 Difference]: With dead ends: 4085 [2021-06-12 22:10:55,028 INFO L226 Difference]: Without dead ends: 4028 [2021-06-12 22:10:55,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2117.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:10:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2021-06-12 22:10:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 2033. [2021-06-12 22:10:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4463582677165356) internal successors, (7003), 2032 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7003 transitions. [2021-06-12 22:10:55,063 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7003 transitions. Word has length 26 [2021-06-12 22:10:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:55,063 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7003 transitions. [2021-06-12 22:10:55,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7003 transitions. [2021-06-12 22:10:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:55,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:55,065 INFO L472 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] [2021-06-12 22:10:55,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1874,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:55,266 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-06-12 22:10:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910028274] [2021-06-12 22:10:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:55,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:55,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910028274] [2021-06-12 22:10:55,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910028274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:55,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179116424] [2021-06-12 22:10:55,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:55,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:55,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:10:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:55,993 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:10:56,198 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 22:10:56,367 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:10:56,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,394 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:56,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:10:56,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,735 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-12 22:10:56,736 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-12 22:10:56,755 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:56,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:56,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,910 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:10:56,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:56,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:56,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:10:56,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,944 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:56,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 1 [2021-06-12 22:10:56,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,080 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:10:57,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,097 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:10:57,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,244 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:10:57,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,263 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:57,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:10:57,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,400 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 22:10:57,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,420 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:57,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:10:57,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,553 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:10:57,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:10:57,573 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,582 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:10:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:10:57,583 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,797 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-06-12 22:10:57,797 INFO L628 ElimStorePlain]: treesize reduction 25, result has 91.7 percent of original size [2021-06-12 22:10:57,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:10:57,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:57,914 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:10:57,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:57,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:57,927 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:360 [2021-06-12 22:10:58,088 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-06-12 22:10:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:58,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179116424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:58,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:58,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:10:58,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122282188] [2021-06-12 22:10:58,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:58,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:58,150 INFO L87 Difference]: Start difference. First operand 2033 states and 7003 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:58,999 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-12 22:10:59,435 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 22:10:59,647 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:10:59,859 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-12 22:11:00,420 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-12 22:11:00,947 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-12 22:11:01,348 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2021-06-12 22:11:01,906 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-12 22:11:02,589 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 109 [2021-06-12 22:11:03,147 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 90 [2021-06-12 22:11:03,403 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2021-06-12 22:11:04,306 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 112 [2021-06-12 22:11:04,816 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 76 [2021-06-12 22:11:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:04,962 INFO L93 Difference]: Finished difference Result 2749 states and 9119 transitions. [2021-06-12 22:11:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:11:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:04,966 INFO L225 Difference]: With dead ends: 2749 [2021-06-12 22:11:04,966 INFO L226 Difference]: Without dead ends: 2719 [2021-06-12 22:11:04,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6893.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:11:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-12 22:11:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2036. [2021-06-12 22:11:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 3.444226044226044) internal successors, (7009), 2035 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7009 transitions. [2021-06-12 22:11:04,990 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7009 transitions. Word has length 26 [2021-06-12 22:11:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:04,990 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 7009 transitions. [2021-06-12 22:11:04,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7009 transitions. [2021-06-12 22:11:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:04,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:04,992 INFO L472 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] [2021-06-12 22:11:05,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1981 [2021-06-12 22:11:05,193 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-06-12 22:11:05,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:05,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463326045] [2021-06-12 22:11:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:05,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463326045] [2021-06-12 22:11:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463326045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764660347] [2021-06-12 22:11:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:05,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:11:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:05,897 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:11:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:05,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:11:06,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:11:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:11:06,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,313 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-06-12 22:11:06,314 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-06-12 22:11:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:11:06,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,465 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:11:06,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:11:06,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,610 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:11:06,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,622 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:06,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:11:06,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,756 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:11:06,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:11:06,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,781 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:11:06,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:11:06,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,892 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 22:11:06,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:11:06,912 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:06,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:06,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:11:06,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,133 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-06-12 22:11:07,133 INFO L628 ElimStorePlain]: treesize reduction 20, result has 91.7 percent of original size [2021-06-12 22:11:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:07,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:11:07,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:07,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:11:07,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:07,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:11:07,310 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-06-12 22:11:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:07,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764660347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:07,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:07,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:11:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638920362] [2021-06-12 22:11:07,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:07,436 INFO L87 Difference]: Start difference. First operand 2036 states and 7009 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:08,184 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 22:11:08,837 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:11:09,016 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:11:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:09,393 INFO L93 Difference]: Finished difference Result 2932 states and 9765 transitions. [2021-06-12 22:11:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:11:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:09,397 INFO L225 Difference]: With dead ends: 2932 [2021-06-12 22:11:09,397 INFO L226 Difference]: Without dead ends: 2898 [2021-06-12 22:11:09,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1960.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:11:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-12 22:11:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2045. [2021-06-12 22:11:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-12 22:11:09,425 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-12 22:11:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:09,425 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-12 22:11:09,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-12 22:11:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:09,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:09,428 INFO L472 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] [2021-06-12 22:11:09,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2017,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:09,628 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-06-12 22:11:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:09,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174042491] [2021-06-12 22:11:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:09,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:09,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174042491] [2021-06-12 22:11:09,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174042491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:09,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984404849] [2021-06-12 22:11:09,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:09,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:09,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:11:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:10,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,373 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 27 [2021-06-12 22:11:10,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:10,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-06-12 22:11:10,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,680 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-12 22:11:10,680 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.4 percent of original size [2021-06-12 22:11:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:11:10,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,708 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:11:10,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:11:10,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,845 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:10,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:11:10,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:11:10,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,975 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:11:10,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:11:10,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:10,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:11:11,000 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:11,110 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 22:11:11,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:11,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:11:11,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:11,135 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:11,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:11:11,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:11,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:11,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:11:11,235 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:176 [2021-06-12 22:11:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984404849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:11,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:11,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:11:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610834619] [2021-06-12 22:11:11,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:11,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:11,360 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,262 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 22:11:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:12,695 INFO L93 Difference]: Finished difference Result 2657 states and 8964 transitions. [2021-06-12 22:11:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:11:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:12,699 INFO L225 Difference]: With dead ends: 2657 [2021-06-12 22:11:12,699 INFO L226 Difference]: Without dead ends: 2632 [2021-06-12 22:11:12,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1412.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:11:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-12 22:11:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2045. [2021-06-12 22:11:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-12 22:11:12,725 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-12 22:11:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:12,725 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-12 22:11:12,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-12 22:11:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:12,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:12,728 INFO L472 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] [2021-06-12 22:11:12,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-12 22:11:12,928 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash 568891871, now seen corresponding path program 48 times [2021-06-12 22:11:12,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:12,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670665583] [2021-06-12 22:11:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670665583] [2021-06-12 22:11:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670665583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779280479] [2021-06-12 22:11:13,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:13,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:11:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-12 22:11:13,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-12 22:11:13,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 22:11:13,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 22:11:13,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 22:11:13,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:11:13,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 22:11:13,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 22:11:13,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:11:13,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 22:11:13,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:11:13,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-12 22:11:13,826 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 22:11:13,832 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:11:13,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:11:13,842 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:13,858 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:11:13,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:11:13,859 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:683, output treesize:15 [2021-06-12 22:11:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779280479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:13,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:11:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377087122] [2021-06-12 22:11:13,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:13,884 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:15,138 INFO L93 Difference]: Finished difference Result 2543 states and 8526 transitions. [2021-06-12 22:11:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:11:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:15,142 INFO L225 Difference]: With dead ends: 2543 [2021-06-12 22:11:15,142 INFO L226 Difference]: Without dead ends: 2521 [2021-06-12 22:11:15,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1299.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:11:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-12 22:11:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2041. [2021-06-12 22:11:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-12 22:11:15,169 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-12 22:11:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:15,169 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-12 22:11:15,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-12 22:11:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:15,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:15,171 INFO L472 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] [2021-06-12 22:11:15,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2081 [2021-06-12 22:11:15,372 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-12 22:11:15,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:15,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605766369] [2021-06-12 22:11:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:15,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605766369] [2021-06-12 22:11:15,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605766369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759156175] [2021-06-12 22:11:15,692 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 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 [2021-06-12 22:11:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:11:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:16,048 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_230, v_prenex_232], 5=[v_prenex_228, A]} [2021-06-12 22:11:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:16,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:16,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:11:16,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:11:16,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:16,153 INFO L628 ElimStorePlain]: treesize reduction 143, result has 43.7 percent of original size [2021-06-12 22:11:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 22:11:16,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:16,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:11:16,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:16,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:16,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:16,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:11:16,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:16,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:16,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:11:16,245 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:27 [2021-06-12 22:11:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:16,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759156175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:16,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:16,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:11:16,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684096560] [2021-06-12 22:11:16,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:11:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:11:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:11:16,282 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:18,496 INFO L93 Difference]: Finished difference Result 2757 states and 9218 transitions. [2021-06-12 22:11:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:11:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:18,501 INFO L225 Difference]: With dead ends: 2757 [2021-06-12 22:11:18,501 INFO L226 Difference]: Without dead ends: 2742 [2021-06-12 22:11:18,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2100.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-06-12 22:11:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2041. [2021-06-12 22:11:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-12 22:11:18,534 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-12 22:11:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:18,534 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-12 22:11:18,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-12 22:11:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:18,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:18,536 INFO L472 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] [2021-06-12 22:11:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:18,753 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-06-12 22:11:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194394881] [2021-06-12 22:11:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:19,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194394881] [2021-06-12 22:11:19,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194394881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13280249] [2021-06-12 22:11:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:19,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:11:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,239 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:11:19,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:11:19,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:19,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-12 22:11:19,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:19,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 22:11:19,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:19,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-12 22:11:19,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,344 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:11:19,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,368 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-12 22:11:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 22:11:19,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,401 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:11:19,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-12 22:11:19,403 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,418 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:11:19,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,433 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:11:19,434 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,449 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:11:19,450 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,465 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:11:19,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,480 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:11:19,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,495 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:11:19,496 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,517 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:11:19,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:11:19,519 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,539 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:11:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 22:11:19,540 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:19,548 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:11:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:11:19,549 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:19,614 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-12 22:11:19,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:11:19,615 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-12 22:11:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13280249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:19,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-12 22:11:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279842867] [2021-06-12 22:11:19,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:11:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:19,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:11:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:11:19,711 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,342 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-12 22:11:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:23,020 INFO L93 Difference]: Finished difference Result 3704 states and 11942 transitions. [2021-06-12 22:11:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:11:23,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:23,025 INFO L225 Difference]: With dead ends: 3704 [2021-06-12 22:11:23,025 INFO L226 Difference]: Without dead ends: 3647 [2021-06-12 22:11:23,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2960.6ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:11:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-12 22:11:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2063. [2021-06-12 22:11:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.4393792434529584) internal successors, (7092), 2062 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7092 transitions. [2021-06-12 22:11:23,057 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7092 transitions. Word has length 26 [2021-06-12 22:11:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:23,057 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7092 transitions. [2021-06-12 22:11:23,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7092 transitions. [2021-06-12 22:11:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:23,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:23,059 INFO L472 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] [2021-06-12 22:11:23,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:23,262 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-12 22:11:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831111621] [2021-06-12 22:11:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:23,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831111621] [2021-06-12 22:11:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831111621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073665714] [2021-06-12 22:11:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:23,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:11:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:11:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:23,843 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-12 22:11:24,072 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:11:24,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 47 [2021-06-12 22:11:24,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:24,117 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-12 22:11:24,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-12 22:11:24,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:24,568 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-12 22:11:24,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:24,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-12 22:11:24,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:24,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:24,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-12 22:11:24,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:25,618 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 168 [2021-06-12 22:11:25,618 INFO L628 ElimStorePlain]: treesize reduction 114, result has 87.7 percent of original size [2021-06-12 22:11:25,671 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:11:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 48 [2021-06-12 22:11:25,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:25,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-12 22:11:25,724 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:26,142 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-12 22:11:26,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:26,198 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 22:11:26,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-12 22:11:26,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:26,249 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:11:26,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-12 22:11:26,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:27,069 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2021-06-12 22:11:27,070 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.3 percent of original size [2021-06-12 22:11:27,119 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:11:27,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 47 [2021-06-12 22:11:27,123 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:27,163 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:11:27,163 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 26 treesize of output 44 [2021-06-12 22:11:27,168 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:27,560 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 22:11:27,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:27,603 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:11:27,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-12 22:11:27,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:27,648 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:11:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-12 22:11:27,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:28,370 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-12 22:11:28,370 INFO L628 ElimStorePlain]: treesize reduction 45, result has 93.8 percent of original size [2021-06-12 22:11:28,418 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:11:28,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 47 [2021-06-12 22:11:28,421 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:28,464 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 22:11:28,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 51 [2021-06-12 22:11:28,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:29,151 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-06-12 22:11:29,152 INFO L628 ElimStorePlain]: treesize reduction 24, result has 96.5 percent of original size [2021-06-12 22:11:29,202 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 22:11:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 22:11:29,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:29,253 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 22:11:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 22:11:29,261 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:30,295 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2021-06-12 22:11:30,295 INFO L628 ElimStorePlain]: treesize reduction 50, result has 93.1 percent of original size [2021-06-12 22:11:30,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-12 22:11:30,339 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:833, output treesize:1677 [2021-06-12 22:11:30,822 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-12 22:11:31,048 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-12 22:11:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073665714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:31,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:11:31,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893106503] [2021-06-12 22:11:31,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:11:31,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:11:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:11:31,172 INFO L87 Difference]: Start difference. First operand 2063 states and 7092 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:31,672 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-12 22:11:31,955 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-12 22:11:32,306 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 22:11:32,987 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-12 22:11:33,259 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-12 22:11:33,657 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-12 22:11:34,061 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-12 22:11:34,249 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-06-12 22:11:34,406 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2021-06-12 22:11:34,840 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-12 22:11:35,602 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-06-12 22:11:35,796 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-06-12 22:11:36,065 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-12 22:11:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:36,574 INFO L93 Difference]: Finished difference Result 3467 states and 11274 transitions. [2021-06-12 22:11:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:11:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:36,580 INFO L225 Difference]: With dead ends: 3467 [2021-06-12 22:11:36,580 INFO L226 Difference]: Without dead ends: 3422 [2021-06-12 22:11:36,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 5697.6ms TimeCoverageRelationStatistics Valid=789, Invalid=3633, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:11:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-12 22:11:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2089. [2021-06-12 22:11:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.4454022988505746) internal successors, (7194), 2088 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7194 transitions. [2021-06-12 22:11:36,619 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7194 transitions. Word has length 26 [2021-06-12 22:11:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:36,619 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 7194 transitions. [2021-06-12 22:11:36,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7194 transitions. [2021-06-12 22:11:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:36,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:36,621 INFO L472 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] [2021-06-12 22:11:36,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:36,822 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-12 22:11:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:36,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246072069] [2021-06-12 22:11:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:37,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:37,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246072069] [2021-06-12 22:11:37,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246072069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:37,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369415728] [2021-06-12 22:11:37,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:11:37,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:37,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:11:37,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:37,543 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_258], 5=[v_prenex_254, v_prenex_256]} [2021-06-12 22:11:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:11:37,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:37,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:11:37,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:37,628 INFO L628 ElimStorePlain]: treesize reduction 130, result has 39.0 percent of original size [2021-06-12 22:11:37,628 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-12 22:11:37,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:37,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-12 22:11:37,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:37,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:37,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:11:37,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:37,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:37,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:11:37,676 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-12 22:11:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:37,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369415728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:37,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:37,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:11:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991980427] [2021-06-12 22:11:37,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:11:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:37,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:11:37,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:11:37,711 INFO L87 Difference]: Start difference. First operand 2089 states and 7194 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,680 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-12 22:11:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:39,922 INFO L93 Difference]: Finished difference Result 2641 states and 8863 transitions. [2021-06-12 22:11:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:11:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:39,926 INFO L225 Difference]: With dead ends: 2641 [2021-06-12 22:11:39,926 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 22:11:39,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2057.2ms TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:11:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 22:11:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2087. [2021-06-12 22:11:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-12 22:11:39,951 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-12 22:11:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:39,951 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-12 22:11:39,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-12 22:11:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:39,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:39,953 INFO L472 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] [2021-06-12 22:11:40,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2346,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:40,157 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-12 22:11:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:40,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200148936] [2021-06-12 22:11:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:40,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:40,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200148936] [2021-06-12 22:11:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200148936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:40,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264200727] [2021-06-12 22:11:40,369 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 [2021-06-12 22:11:40,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:11:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:11:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:42,922 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 54 [2021-06-12 22:11:43,165 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:11:43,348 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_270, v_prenex_271, v_prenex_273, v_prenex_267, v_prenex_268], 6=[v_prenex_272, v_prenex_269]} [2021-06-12 22:11:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:43,384 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:11:43,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-12 22:11:43,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:43,420 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:11:43,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:11:43,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:44,139 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2021-06-12 22:11:44,139 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.1 percent of original size [2021-06-12 22:11:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,175 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:11:44,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-12 22:11:44,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,202 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:11:44,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 22:11:44,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:44,534 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-12 22:11:44,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:44,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:44,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-12 22:11:44,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:44,605 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:11:44,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 22:11:44,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,499 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 142 [2021-06-12 22:11:45,499 INFO L628 ElimStorePlain]: treesize reduction 46, result has 93.5 percent of original size [2021-06-12 22:11:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,528 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:11:45,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-12 22:11:45,530 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,555 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:11:45,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 22:11:45,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,840 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-12 22:11:45,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:45,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,886 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:11:45,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-12 22:11:45,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,917 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:11:45,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-12 22:11:45,920 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:46,187 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:11:46,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,219 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:11:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-12 22:11:46,221 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:46,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-12 22:11:46,250 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:46,714 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-12 22:11:46,715 INFO L628 ElimStorePlain]: treesize reduction 35, result has 93.7 percent of original size [2021-06-12 22:11:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,743 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 22:11:46,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 22:11:46,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:46,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:46,768 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 22:11:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-12 22:11:46,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:47,161 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-06-12 22:11:47,162 INFO L628 ElimStorePlain]: treesize reduction 41, result has 91.5 percent of original size [2021-06-12 22:11:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:47,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-12 22:11:47,194 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:47,217 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 22:11:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 22:11:47,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:47,405 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 22:11:47,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:47,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-12 22:11:47,418 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:384 [2021-06-12 22:11:47,605 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-06-12 22:11:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264200727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:47,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:47,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-12 22:11:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633705583] [2021-06-12 22:11:47,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:11:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:11:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:11:47,644 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-06-12 22:11:58,182 WARN L205 SmtUtils]: Spent 9.11 s on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 22:12:01,282 WARN L205 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-12 22:12:01,958 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 170 [2021-06-12 22:12:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:02,559 INFO L93 Difference]: Finished difference Result 3018 states and 10044 transitions. [2021-06-12 22:12:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:12:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:02,563 INFO L225 Difference]: With dead ends: 3018 [2021-06-12 22:12:02,563 INFO L226 Difference]: Without dead ends: 2988 [2021-06-12 22:12:02,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 17150.4ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:12:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-12 22:12:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2087. [2021-06-12 22:12:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-12 22:12:02,591 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-12 22:12:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:02,591 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-12 22:12:02,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-06-12 22:12:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-12 22:12:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:02,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:02,594 INFO L472 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] [2021-06-12 22:12:02,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:02,794 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-12 22:12:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:02,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544568845] [2021-06-12 22:12:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:03,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544568845] [2021-06-12 22:12:03,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544568845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451062213] [2021-06-12 22:12:03,061 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 [2021-06-12 22:12:03,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:12:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:12:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,308 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:12:03,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:12:03,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:03,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-12 22:12:03,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:03,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 22:12:03,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-12 22:12:03,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,418 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:12:03,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,441 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-12 22:12:03,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 22:12:03,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,466 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:12:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-12 22:12:03,468 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,484 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:12:03,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,499 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:12:03,499 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,515 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,515 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 37 treesize of output 1 [2021-06-12 22:12:03,516 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,531 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:12:03,532 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,546 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:12:03,546 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,561 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:12:03,562 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,583 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:12:03,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:03,585 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,606 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:12:03,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 22:12:03,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:03,615 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:12:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:12:03,616 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:03,684 INFO L628 ElimStorePlain]: treesize reduction 126, result has 35.4 percent of original size [2021-06-12 22:12:03,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:12:03,685 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-12 22:12:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:03,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451062213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:03,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:03,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:12:03,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58313651] [2021-06-12 22:12:03,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:03,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:03,769 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:06,317 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-12 22:12:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:06,872 INFO L93 Difference]: Finished difference Result 3534 states and 11458 transitions. [2021-06-12 22:12:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:12:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:06,878 INFO L225 Difference]: With dead ends: 3534 [2021-06-12 22:12:06,878 INFO L226 Difference]: Without dead ends: 3500 [2021-06-12 22:12:06,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2874.8ms TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:12:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-12 22:12:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2096. [2021-06-12 22:12:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4520286396181383) internal successors, (7232), 2095 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7232 transitions. [2021-06-12 22:12:06,917 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7232 transitions. Word has length 26 [2021-06-12 22:12:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:06,918 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7232 transitions. [2021-06-12 22:12:06,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7232 transitions. [2021-06-12 22:12:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:06,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:06,920 INFO L472 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] [2021-06-12 22:12:07,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2429,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:07,131 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash -505799277, now seen corresponding path program 30 times [2021-06-12 22:12:07,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:07,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034113911] [2021-06-12 22:12:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:07,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:07,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034113911] [2021-06-12 22:12:07,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034113911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:07,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790452687] [2021-06-12 22:12:07,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:07,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:12:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:07,702 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:07,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:12:07,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,724 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:07,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:12:07,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,744 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:07,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:12:07,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,754 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:07,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:07,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:12:07,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,782 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:07,783 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,801 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:12:07,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,815 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:07,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,825 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:07,826 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,835 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:07,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,852 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:12:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 23 [2021-06-12 22:12:07,853 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,862 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:07,862 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,871 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:07,871 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,881 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 1 [2021-06-12 22:12:07,882 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,893 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:12:07,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-06-12 22:12:07,894 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,900 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:07,900 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:07,900 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:08,088 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-12 22:12:08,088 INFO L628 ElimStorePlain]: treesize reduction 43, result has 79.1 percent of original size [2021-06-12 22:12:08,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:12:08,102 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-12 22:12:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:08,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790452687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:08,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 22:12:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339511874] [2021-06-12 22:12:08,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:12:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:12:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:08,240 INFO L87 Difference]: Start difference. First operand 2096 states and 7232 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,135 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-12 22:12:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:09,765 INFO L93 Difference]: Finished difference Result 2796 states and 9280 transitions. [2021-06-12 22:12:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:12:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:09,770 INFO L225 Difference]: With dead ends: 2796 [2021-06-12 22:12:09,770 INFO L226 Difference]: Without dead ends: 2751 [2021-06-12 22:12:09,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1512.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:12:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-12 22:12:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2123. [2021-06-12 22:12:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.4542884071630535) internal successors, (7330), 2122 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7330 transitions. [2021-06-12 22:12:09,800 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7330 transitions. Word has length 26 [2021-06-12 22:12:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:09,800 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 7330 transitions. [2021-06-12 22:12:09,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7330 transitions. [2021-06-12 22:12:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:09,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:09,803 INFO L472 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] [2021-06-12 22:12:10,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2464 [2021-06-12 22:12:10,004 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash 266862281, now seen corresponding path program 31 times [2021-06-12 22:12:10,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:10,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729625395] [2021-06-12 22:12:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:10,241 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 22:12:10,419 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-06-12 22:12:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:10,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:10,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729625395] [2021-06-12 22:12:10,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729625395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:10,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106922568] [2021-06-12 22:12:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:12:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:10,670 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 24 treesize of output 24 [2021-06-12 22:12:10,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-12 22:12:10,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,698 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:10,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-06-12 22:12:10,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 22:12:10,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,725 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-12 22:12:10,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 22:12:10,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,747 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 47 treesize of output 1 [2021-06-12 22:12:10,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,758 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 40 treesize of output 22 [2021-06-12 22:12:10,759 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:12:10,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-12 22:12:10,780 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,789 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 45 treesize of output 27 [2021-06-12 22:12:10,789 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,798 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,798 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 40 treesize of output 22 [2021-06-12 22:12:10,799 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,810 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:10,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 22:12:10,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-12 22:12:10,822 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,833 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-06-12 22:12:10,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:10,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:10,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 22:12:10,841 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:10,957 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-06-12 22:12:10,958 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-12 22:12:10,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:12:10,959 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-12 22:12:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:11,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106922568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:11,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:11,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:11,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130774062] [2021-06-12 22:12:11,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:11,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:11,041 INFO L87 Difference]: Start difference. First operand 2123 states and 7330 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,319 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-12 22:12:12,723 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 22:12:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:12,880 INFO L93 Difference]: Finished difference Result 2903 states and 9622 transitions. [2021-06-12 22:12:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:12:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:12,884 INFO L225 Difference]: With dead ends: 2903 [2021-06-12 22:12:12,884 INFO L226 Difference]: Without dead ends: 2858 [2021-06-12 22:12:12,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1927.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:12:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-12 22:12:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2119. [2021-06-12 22:12:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.453257790368272) internal successors, (7314), 2118 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7314 transitions. [2021-06-12 22:12:12,910 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7314 transitions. Word has length 26 [2021-06-12 22:12:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:12,910 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7314 transitions. [2021-06-12 22:12:12,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7314 transitions. [2021-06-12 22:12:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:12,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:12,913 INFO L472 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] [2021-06-12 22:12:13,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2512,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:13,113 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash -176639705, now seen corresponding path program 32 times [2021-06-12 22:12:13,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:13,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407558853] [2021-06-12 22:12:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:13,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407558853] [2021-06-12 22:12:13,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407558853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762996894] [2021-06-12 22:12:13,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:13,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:13,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:13,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:13,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:12:13,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:13,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:12:13,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:13,864 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.9 percent of original size [2021-06-12 22:12:13,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:13,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:13,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:13,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:13,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:13,923 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-06-12 22:12:13,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:13,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-12 22:12:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:13,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762996894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:13,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:13,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:12:13,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268447877] [2021-06-12 22:12:13,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:12:13,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:13,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:12:13,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:12:13,954 INFO L87 Difference]: Start difference. First operand 2119 states and 7314 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,020 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-12 22:12:15,184 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-12 22:12:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:15,293 INFO L93 Difference]: Finished difference Result 2789 states and 9380 transitions. [2021-06-12 22:12:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:12:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:15,297 INFO L225 Difference]: With dead ends: 2789 [2021-06-12 22:12:15,297 INFO L226 Difference]: Without dead ends: 2774 [2021-06-12 22:12:15,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1348.0ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:12:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-06-12 22:12:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2117. [2021-06-12 22:12:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 3.452741020793951) internal successors, (7306), 2116 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 7306 transitions. [2021-06-12 22:12:15,324 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 7306 transitions. Word has length 26 [2021-06-12 22:12:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:15,324 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 7306 transitions. [2021-06-12 22:12:15,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 7306 transitions. [2021-06-12 22:12:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:15,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:15,326 INFO L472 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] [2021-06-12 22:12:15,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-06-12 22:12:15,527 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 33 times [2021-06-12 22:12:15,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:15,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792385905] [2021-06-12 22:12:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:15,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:15,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792385905] [2021-06-12 22:12:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792385905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399938477] [2021-06-12 22:12:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:15,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:12:15,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:12:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,013 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:16,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:16,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:12:16,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,036 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:16,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:16,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:16,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:16,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,072 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:16,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:16,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:16,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,099 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:16,100 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:16,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,125 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:12:16,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,138 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:16,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:12:16,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,150 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:12:16,151 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:12:16,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:16,168 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:16,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:16,174 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,256 INFO L628 ElimStorePlain]: treesize reduction 44, result has 67.9 percent of original size [2021-06-12 22:12:16,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:12:16,259 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:75 [2021-06-12 22:12:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:16,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399938477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:16,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:16,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:12:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087889917] [2021-06-12 22:12:16,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:16,339 INFO L87 Difference]: Start difference. First operand 2117 states and 7306 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:16,765 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-12 22:12:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:17,275 INFO L93 Difference]: Finished difference Result 2583 states and 8714 transitions. [2021-06-12 22:12:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:12:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:17,279 INFO L225 Difference]: With dead ends: 2583 [2021-06-12 22:12:17,279 INFO L226 Difference]: Without dead ends: 2568 [2021-06-12 22:12:17,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:12:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-12 22:12:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2111. [2021-06-12 22:12:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 3.4526066350710902) internal successors, (7285), 2110 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 7285 transitions. [2021-06-12 22:12:17,306 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 7285 transitions. Word has length 26 [2021-06-12 22:12:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:17,306 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 7285 transitions. [2021-06-12 22:12:17,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 7285 transitions. [2021-06-12 22:12:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:17,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:17,309 INFO L472 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] [2021-06-12 22:12:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-12 22:12:17,521 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 34 times [2021-06-12 22:12:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241400826] [2021-06-12 22:12:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:17,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:17,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241400826] [2021-06-12 22:12:17,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241400826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:17,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945617072] [2021-06-12 22:12:17,745 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 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 [2021-06-12 22:12:17,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:17,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,274 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:18,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-06-12 22:12:18,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:18,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:12:18,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:18,663 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-12 22:12:18,664 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.3 percent of original size [2021-06-12 22:12:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,687 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:12:18,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:18,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,711 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:18,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:12:18,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:18,879 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 22:12:18,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:18,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:12:18,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:18,923 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:18,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:19,230 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-12 22:12:19,230 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-06-12 22:12:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:19,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:12:19,251 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:19,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:19,278 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:19,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:12:19,280 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:19,420 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:12:19,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:19,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:19,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:12:19,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:19,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:19,459 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:19,460 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:19,713 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-12 22:12:19,713 INFO L628 ElimStorePlain]: treesize reduction 16, result has 94.8 percent of original size [2021-06-12 22:12:19,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:12:19,732 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:259 [2021-06-12 22:12:19,910 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-06-12 22:12:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:19,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945617072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:19,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:19,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:12:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290196735] [2021-06-12 22:12:19,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:12:19,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:12:19,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:12:19,946 INFO L87 Difference]: Start difference. First operand 2111 states and 7285 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,165 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-06-12 22:12:20,477 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-12 22:12:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:20,923 INFO L93 Difference]: Finished difference Result 2792 states and 9404 transitions. [2021-06-12 22:12:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:12:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:20,927 INFO L225 Difference]: With dead ends: 2792 [2021-06-12 22:12:20,927 INFO L226 Difference]: Without dead ends: 2767 [2021-06-12 22:12:20,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1324.1ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:12:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-06-12 22:12:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2092. [2021-06-12 22:12:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-12 22:12:20,953 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-12 22:12:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:20,953 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-12 22:12:20,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-12 22:12:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:20,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:20,955 INFO L472 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] [2021-06-12 22:12:21,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2598,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:21,156 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 35 times [2021-06-12 22:12:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:21,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876968696] [2021-06-12 22:12:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:21,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:21,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876968696] [2021-06-12 22:12:21,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876968696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959650557] [2021-06-12 22:12:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:21,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:21,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:21,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:21,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:21,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:12:21,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:21,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:21,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 22:12:21,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:12:21,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:21,697 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:21,702 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:21,708 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:21,713 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:12:21,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:21,724 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:21,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:21,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:21,727 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:21,747 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:12:21,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:12:21,748 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-12 22:12:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:21,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959650557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:21,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:21,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:21,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776957141] [2021-06-12 22:12:21,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:21,772 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:22,580 INFO L93 Difference]: Finished difference Result 2658 states and 8951 transitions. [2021-06-12 22:12:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:12:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:22,584 INFO L225 Difference]: With dead ends: 2658 [2021-06-12 22:12:22,584 INFO L226 Difference]: Without dead ends: 2643 [2021-06-12 22:12:22,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:12:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-12 22:12:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2095. [2021-06-12 22:12:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.451289398280802) internal successors, (7227), 2094 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 7227 transitions. [2021-06-12 22:12:22,609 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 7227 transitions. Word has length 26 [2021-06-12 22:12:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:22,609 INFO L482 AbstractCegarLoop]: Abstraction has 2095 states and 7227 transitions. [2021-06-12 22:12:22,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 7227 transitions. [2021-06-12 22:12:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:22,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:22,612 INFO L472 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] [2021-06-12 22:12:22,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:22,812 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 36 times [2021-06-12 22:12:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:22,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220300900] [2021-06-12 22:12:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220300900] [2021-06-12 22:12:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220300900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328741119] [2021-06-12 22:12:22,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:22,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:12:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,171 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:23,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:23,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:23,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:23,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:23,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:23,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:23,226 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,235 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:23,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,247 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:23,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:12:23,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:12:23,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:23,268 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:12:23,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,286 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:23,286 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:23,295 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:23,303 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,310 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:23,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:12:23,321 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,394 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-12 22:12:23,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:12:23,395 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-12 22:12:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328741119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539993898] [2021-06-12 22:12:23,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:23,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:23,481 INFO L87 Difference]: Start difference. First operand 2095 states and 7227 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:24,448 INFO L93 Difference]: Finished difference Result 2926 states and 9825 transitions. [2021-06-12 22:12:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:12:24,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:24,453 INFO L225 Difference]: With dead ends: 2926 [2021-06-12 22:12:24,453 INFO L226 Difference]: Without dead ends: 2911 [2021-06-12 22:12:24,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:12:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-12 22:12:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2092. [2021-06-12 22:12:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-12 22:12:24,480 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-12 22:12:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:24,480 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-12 22:12:24,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-12 22:12:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:24,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:24,483 INFO L472 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] [2021-06-12 22:12:24,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:24,683 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 37 times [2021-06-12 22:12:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:24,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550841302] [2021-06-12 22:12:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:24,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:24,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550841302] [2021-06-12 22:12:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550841302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:24,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68658068] [2021-06-12 22:12:24,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-12 22:12:25,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:25,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 13 [2021-06-12 22:12:25,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:25,161 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-06-12 22:12:25,161 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-06-12 22:12:25,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:25,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:25,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:25,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:25,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:25,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:25,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:25,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:25,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:12:25,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-06-12 22:12:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:25,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68658068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:25,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:25,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:25,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774621651] [2021-06-12 22:12:25,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:25,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:25,257 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:25,765 INFO L93 Difference]: Finished difference Result 2732 states and 9177 transitions. [2021-06-12 22:12:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:12:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:25,769 INFO L225 Difference]: With dead ends: 2732 [2021-06-12 22:12:25,769 INFO L226 Difference]: Without dead ends: 2702 [2021-06-12 22:12:25,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 591.8ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:12:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2021-06-12 22:12:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2096. [2021-06-12 22:12:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.452505966587112) internal successors, (7233), 2095 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7233 transitions. [2021-06-12 22:12:25,794 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7233 transitions. Word has length 26 [2021-06-12 22:12:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:25,794 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7233 transitions. [2021-06-12 22:12:25,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7233 transitions. [2021-06-12 22:12:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:25,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:25,796 INFO L472 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] [2021-06-12 22:12:25,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2729 [2021-06-12 22:12:25,997 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 38 times [2021-06-12 22:12:25,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:25,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461562593] [2021-06-12 22:12:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:26,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:26,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461562593] [2021-06-12 22:12:26,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461562593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:26,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817508436] [2021-06-12 22:12:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:26,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:26,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,596 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:26,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:12:26,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,619 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:12:26,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:26,753 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:12:26,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,774 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:12:26,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:26,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:12:26,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:26,914 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:12:26,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,935 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:26,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:12:26,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:26,958 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:12:26,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:27,116 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:12:27,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:27,136 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:12:27,137 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:27,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:27,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:12:27,155 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:27,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:27,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:27,284 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:241 [2021-06-12 22:12:27,465 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-06-12 22:12:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817508436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:27,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:27,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:12:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917586568] [2021-06-12 22:12:27,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:27,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:27,500 INFO L87 Difference]: Start difference. First operand 2096 states and 7233 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:27,883 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-12 22:12:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:28,221 INFO L93 Difference]: Finished difference Result 2726 states and 9219 transitions. [2021-06-12 22:12:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:28,225 INFO L225 Difference]: With dead ends: 2726 [2021-06-12 22:12:28,225 INFO L226 Difference]: Without dead ends: 2711 [2021-06-12 22:12:28,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 960.2ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:12:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-12 22:12:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2120. [2021-06-12 22:12:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.4502123643227938) internal successors, (7311), 2119 states have internal predecessors, (7311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7311 transitions. [2021-06-12 22:12:28,251 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7311 transitions. Word has length 26 [2021-06-12 22:12:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:28,251 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7311 transitions. [2021-06-12 22:12:28,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7311 transitions. [2021-06-12 22:12:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:28,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:28,253 INFO L472 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] [2021-06-12 22:12:28,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-12 22:12:28,454 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 39 times [2021-06-12 22:12:28,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:28,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832602974] [2021-06-12 22:12:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:28,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832602974] [2021-06-12 22:12:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832602974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921085192] [2021-06-12 22:12:28,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:28,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:28,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:12:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:29,105 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:12:29,341 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_312, v_prenex_313]} [2021-06-12 22:12:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:29,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:29,413 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-12 22:12:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:29,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:29,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:29,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:29,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:29,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:29,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:29,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:29,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:29,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-12 22:12:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921085192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:29,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:29,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:12:29,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361090269] [2021-06-12 22:12:29,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:12:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:12:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:12:29,499 INFO L87 Difference]: Start difference. First operand 2120 states and 7311 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) [2021-06-12 22:12:30,258 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 22:12:30,470 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-12 22:12:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:30,651 INFO L93 Difference]: Finished difference Result 2785 states and 9315 transitions. [2021-06-12 22:12:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:12:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:30,655 INFO L225 Difference]: With dead ends: 2785 [2021-06-12 22:12:30,655 INFO L226 Difference]: Without dead ends: 2740 [2021-06-12 22:12:30,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1355.6ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:12:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-12 22:12:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2156. [2021-06-12 22:12:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.451508120649652) internal successors, (7438), 2155 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7438 transitions. [2021-06-12 22:12:30,680 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7438 transitions. Word has length 26 [2021-06-12 22:12:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:30,681 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7438 transitions. [2021-06-12 22:12:30,681 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) [2021-06-12 22:12:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7438 transitions. [2021-06-12 22:12:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:30,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:30,683 INFO L472 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] [2021-06-12 22:12:30,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:30,883 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 40 times [2021-06-12 22:12:30,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:30,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657251323] [2021-06-12 22:12:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:31,131 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-06-12 22:12:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:31,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657251323] [2021-06-12 22:12:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657251323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059711956] [2021-06-12 22:12:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:31,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:31,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:12:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:31,408 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 24 treesize of output 24 [2021-06-12 22:12:31,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:31,422 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 45 treesize of output 31 [2021-06-12 22:12:31,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,435 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:31,436 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 38 treesize of output 26 [2021-06-12 22:12:31,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:31,449 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 40 treesize of output 28 [2021-06-12 22:12:31,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,462 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-12 22:12:31,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,473 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 45 treesize of output 25 [2021-06-12 22:12:31,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,484 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 47 treesize of output 1 [2021-06-12 22:12:31,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,506 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,506 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 40 treesize of output 22 [2021-06-12 22:12:31,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,518 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 38 treesize of output 1 [2021-06-12 22:12:31,519 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,527 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 40 treesize of output 24 [2021-06-12 22:12:31,528 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,537 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,537 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 45 treesize of output 27 [2021-06-12 22:12:31,537 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,546 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,546 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 40 treesize of output 22 [2021-06-12 22:12:31,547 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:31,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 22:12:31,560 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-12 22:12:31,571 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:31,582 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 47 treesize of output 27 [2021-06-12 22:12:31,583 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:31,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 22:12:31,590 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:31,705 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-06-12 22:12:31,706 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-12 22:12:31,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:12:31,707 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-12 22:12:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:31,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059711956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:31,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:31,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:31,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292742227] [2021-06-12 22:12:31,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:31,794 INFO L87 Difference]: Start difference. First operand 2156 states and 7438 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:32,787 INFO L93 Difference]: Finished difference Result 2977 states and 9961 transitions. [2021-06-12 22:12:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:12:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:32,791 INFO L225 Difference]: With dead ends: 2977 [2021-06-12 22:12:32,791 INFO L226 Difference]: Without dead ends: 2947 [2021-06-12 22:12:32,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1116.5ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:12:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-12 22:12:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2143. [2021-06-12 22:12:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4495798319327733) internal successors, (7389), 2142 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7389 transitions. [2021-06-12 22:12:32,819 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7389 transitions. Word has length 26 [2021-06-12 22:12:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:32,819 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7389 transitions. [2021-06-12 22:12:32,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7389 transitions. [2021-06-12 22:12:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:32,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:32,822 INFO L472 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] [2021-06-12 22:12:33,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2819,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:33,022 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 41 times [2021-06-12 22:12:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:33,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991137630] [2021-06-12 22:12:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:33,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:33,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991137630] [2021-06-12 22:12:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991137630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:33,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001941781] [2021-06-12 22:12:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:33,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:12:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:33,629 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 22:12:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:12:33,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:33,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,073 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-12 22:12:34,074 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-12 22:12:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:34,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:34,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,389 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-12 22:12:34,390 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.8 percent of original size [2021-06-12 22:12:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:12:34,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:34,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,540 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 22:12:34,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:34,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:34,554 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:12:34,566 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,687 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 22:12:34,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:34,703 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:34,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:12:34,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:34,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:34,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:12:34,815 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-12 22:12:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:34,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001941781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:34,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:34,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:12:34,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710707812] [2021-06-12 22:12:34,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:12:34,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:12:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:12:34,939 INFO L87 Difference]: Start difference. First operand 2143 states and 7389 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) [2021-06-12 22:12:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:35,749 INFO L93 Difference]: Finished difference Result 2746 states and 9264 transitions. [2021-06-12 22:12:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:12:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:35,753 INFO L225 Difference]: With dead ends: 2746 [2021-06-12 22:12:35,753 INFO L226 Difference]: Without dead ends: 2721 [2021-06-12 22:12:35,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:12:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-12 22:12:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2147. [2021-06-12 22:12:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.449673811742777) internal successors, (7403), 2146 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7403 transitions. [2021-06-12 22:12:35,781 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7403 transitions. Word has length 26 [2021-06-12 22:12:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:35,781 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7403 transitions. [2021-06-12 22:12:35,781 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) [2021-06-12 22:12:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7403 transitions. [2021-06-12 22:12:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:35,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:35,783 INFO L472 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] [2021-06-12 22:12:35,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:35,984 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 42 times [2021-06-12 22:12:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:35,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776033091] [2021-06-12 22:12:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:36,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776033091] [2021-06-12 22:12:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776033091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509498452] [2021-06-12 22:12:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:36,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:12:36,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:36,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:36,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:36,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:36,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:36,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 22:12:36,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:36,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:36,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:12:36,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:12:36,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:12:36,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:36,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:12:36,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:36,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:12:36,601 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,611 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 1 [2021-06-12 22:12:36,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:36,620 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:12:36,632 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,638 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:36,638 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 1 [2021-06-12 22:12:36,639 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,705 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-12 22:12:36,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:12:36,706 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-12 22:12:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509498452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:36,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675269751] [2021-06-12 22:12:36,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:36,795 INFO L87 Difference]: Start difference. First operand 2147 states and 7403 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:37,548 INFO L93 Difference]: Finished difference Result 2702 states and 9149 transitions. [2021-06-12 22:12:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:37,553 INFO L225 Difference]: With dead ends: 2702 [2021-06-12 22:12:37,553 INFO L226 Difference]: Without dead ends: 2687 [2021-06-12 22:12:37,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:12:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-12 22:12:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2153. [2021-06-12 22:12:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.451208178438662) internal successors, (7427), 2152 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7427 transitions. [2021-06-12 22:12:37,582 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7427 transitions. Word has length 26 [2021-06-12 22:12:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:37,582 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7427 transitions. [2021-06-12 22:12:37,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7427 transitions. [2021-06-12 22:12:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:37,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:37,585 INFO L472 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] [2021-06-12 22:12:37,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-12 22:12:37,785 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-06-12 22:12:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:37,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781438394] [2021-06-12 22:12:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:37,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781438394] [2021-06-12 22:12:37,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781438394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669829152] [2021-06-12 22:12:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:38,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:38,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:12:38,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:12:38,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:12:38,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:12:38,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:12:38,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:12:38,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:12:38,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:38,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:12:38,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:38,516 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:12:38,523 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:38,530 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:38,537 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:38,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:38,540 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:38,559 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:12:38,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:12:38,560 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:12:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669829152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:38,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:38,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:12:38,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959026747] [2021-06-12 22:12:38,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:38,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:38,582 INFO L87 Difference]: Start difference. First operand 2153 states and 7427 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:39,215 INFO L93 Difference]: Finished difference Result 2728 states and 8906 transitions. [2021-06-12 22:12:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:12:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:39,219 INFO L225 Difference]: With dead ends: 2728 [2021-06-12 22:12:39,219 INFO L226 Difference]: Without dead ends: 2691 [2021-06-12 22:12:39,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:12:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-12 22:12:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2175. [2021-06-12 22:12:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4498620055197793) internal successors, (7500), 2174 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7500 transitions. [2021-06-12 22:12:39,245 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7500 transitions. Word has length 26 [2021-06-12 22:12:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:39,245 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7500 transitions. [2021-06-12 22:12:39,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7500 transitions. [2021-06-12 22:12:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:39,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:39,247 INFO L472 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] [2021-06-12 22:12:39,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2895 [2021-06-12 22:12:39,448 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:39,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-06-12 22:12:39,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:39,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034853199] [2021-06-12 22:12:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:39,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034853199] [2021-06-12 22:12:39,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034853199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532690950] [2021-06-12 22:12:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:39,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:39,970 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_328, v_prenex_324], 5=[A, v_prenex_326]} [2021-06-12 22:12:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:39,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:39,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:39,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:39,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:39,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:39,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:39,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:39,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:40,066 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-06-12 22:12:40,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-12 22:12:40,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:40,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:12:40,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:40,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:12:40,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:40,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:40,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:12:40,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-12 22:12:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532690950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:40,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:12:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022264071] [2021-06-12 22:12:40,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:40,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:40,160 INFO L87 Difference]: Start difference. First operand 2175 states and 7500 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,141 INFO L93 Difference]: Finished difference Result 2675 states and 8982 transitions. [2021-06-12 22:12:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:12:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,145 INFO L225 Difference]: With dead ends: 2675 [2021-06-12 22:12:41,145 INFO L226 Difference]: Without dead ends: 2629 [2021-06-12 22:12:41,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:12:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-12 22:12:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2171. [2021-06-12 22:12:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.4442396313364054) internal successors, (7474), 2170 states have internal predecessors, (7474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7474 transitions. [2021-06-12 22:12:41,170 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7474 transitions. Word has length 26 [2021-06-12 22:12:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,170 INFO L482 AbstractCegarLoop]: Abstraction has 2171 states and 7474 transitions. [2021-06-12 22:12:41,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7474 transitions. [2021-06-12 22:12:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:41,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,173 INFO L472 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] [2021-06-12 22:12:41,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:41,373 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-06-12 22:12:41,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683064428] [2021-06-12 22:12:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:41,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683064428] [2021-06-12 22:12:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683064428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:41,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271847721] [2021-06-12 22:12:41,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:41,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:41,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:41,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:12:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:42,016 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_333, v_prenex_335], 5=[A, v_prenex_334]} [2021-06-12 22:12:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:42,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:42,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,134 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 22:12:42,135 INFO L628 ElimStorePlain]: treesize reduction 143, result has 42.8 percent of original size [2021-06-12 22:12:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 22:12:42,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:12:42,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:42,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-12 22:12:42,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:42,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:42,239 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:24 [2021-06-12 22:12:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:42,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271847721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:42,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:12:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277505496] [2021-06-12 22:12:42,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:42,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:42,276 INFO L87 Difference]: Start difference. First operand 2171 states and 7474 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:42,938 INFO L93 Difference]: Finished difference Result 2624 states and 8866 transitions. [2021-06-12 22:12:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:12:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:42,942 INFO L225 Difference]: With dead ends: 2624 [2021-06-12 22:12:42,942 INFO L226 Difference]: Without dead ends: 2609 [2021-06-12 22:12:42,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:12:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-12 22:12:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2181. [2021-06-12 22:12:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.445412844036697) internal successors, (7511), 2180 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7511 transitions. [2021-06-12 22:12:42,968 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7511 transitions. Word has length 26 [2021-06-12 22:12:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:42,968 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 7511 transitions. [2021-06-12 22:12:42,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7511 transitions. [2021-06-12 22:12:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:42,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:42,971 INFO L472 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] [2021-06-12 22:12:43,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-12 22:12:43,171 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:43,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 43 times [2021-06-12 22:12:43,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:43,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086765902] [2021-06-12 22:12:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:43,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:43,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086765902] [2021-06-12 22:12:43,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086765902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040773959] [2021-06-12 22:12:43,467 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 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 [2021-06-12 22:12:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:12:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:43,834 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_338], 2=[A, v_prenex_336]} [2021-06-12 22:12:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:12:43,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,935 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-12 22:12:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:43,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:43,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:43,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:43,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:12:43,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:44,027 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-12 22:12:44,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:44,029 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-12 22:12:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040773959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:12:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921285085] [2021-06-12 22:12:44,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:44,066 INFO L87 Difference]: Start difference. First operand 2181 states and 7511 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:44,755 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-12 22:12:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:45,063 INFO L93 Difference]: Finished difference Result 2827 states and 9420 transitions. [2021-06-12 22:12:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:12:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:45,067 INFO L225 Difference]: With dead ends: 2827 [2021-06-12 22:12:45,068 INFO L226 Difference]: Without dead ends: 2797 [2021-06-12 22:12:45,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:12:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-12 22:12:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2189. [2021-06-12 22:12:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.4437842778793417) internal successors, (7535), 2188 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7535 transitions. [2021-06-12 22:12:45,101 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7535 transitions. Word has length 26 [2021-06-12 22:12:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:45,101 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 7535 transitions. [2021-06-12 22:12:45,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7535 transitions. [2021-06-12 22:12:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:45,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:45,103 INFO L472 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] [2021-06-12 22:12:45,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:45,305 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:45,305 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-06-12 22:12:45,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:45,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133554993] [2021-06-12 22:12:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133554993] [2021-06-12 22:12:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133554993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886062943] [2021-06-12 22:12:45,441 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 [2021-06-12 22:12:45,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:45,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:45,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:12:45,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:12:45,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:45,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:12:45,932 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:45,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:45,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:12:45,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:12:45,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:12:45,981 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:12:45,989 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:12:45,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:12:46,003 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:46,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:12:46,011 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:46,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:46,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:12:46,016 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:46,040 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-12 22:12:46,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:12:46,041 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:12:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886062943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:46,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:12:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307304750] [2021-06-12 22:12:46,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:46,066 INFO L87 Difference]: Start difference. First operand 2189 states and 7535 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:46,934 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-12 22:12:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:47,181 INFO L93 Difference]: Finished difference Result 3223 states and 10393 transitions. [2021-06-12 22:12:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:12:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:47,185 INFO L225 Difference]: With dead ends: 3223 [2021-06-12 22:12:47,185 INFO L226 Difference]: Without dead ends: 3186 [2021-06-12 22:12:47,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:12:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-12 22:12:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2237. [2021-06-12 22:12:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4485688729874777) internal successors, (7711), 2236 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7711 transitions. [2021-06-12 22:12:47,217 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7711 transitions. Word has length 26 [2021-06-12 22:12:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:47,217 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 7711 transitions. [2021-06-12 22:12:47,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7711 transitions. [2021-06-12 22:12:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:47,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:47,219 INFO L472 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] [2021-06-12 22:12:47,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:47,429 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 44 times [2021-06-12 22:12:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:47,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971552210] [2021-06-12 22:12:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:47,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971552210] [2021-06-12 22:12:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971552210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808731879] [2021-06-12 22:12:47,722 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 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 [2021-06-12 22:12:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:12:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:48,159 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-12 22:12:48,702 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:48,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:48,715 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:48,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:48,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,071 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-12 22:12:49,072 INFO L628 ElimStorePlain]: treesize reduction 74, result has 84.5 percent of original size [2021-06-12 22:12:49,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:12:49,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,255 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 22:12:49,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:12:49,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,293 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:49,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 1 [2021-06-12 22:12:49,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,435 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:12:49,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:12:49,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,600 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:12:49,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,626 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:49,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:12:49,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:49,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:12:49,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:49,907 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-06-12 22:12:49,907 INFO L628 ElimStorePlain]: treesize reduction 27, result has 91.1 percent of original size [2021-06-12 22:12:49,929 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:49,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:12:49,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:50,043 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:12:50,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:50,063 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:12:50,067 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:50,174 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 22:12:50,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:50,192 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:50,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:50,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:50,300 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 22:12:50,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:50,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:50,314 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:412 [2021-06-12 22:12:50,474 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-12 22:12:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:50,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808731879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:50,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:50,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:12:50,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244989325] [2021-06-12 22:12:50,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:12:50,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:12:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:50,587 INFO L87 Difference]: Start difference. First operand 2237 states and 7711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:51,730 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-12 22:12:52,341 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-12 22:12:52,771 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-06-12 22:12:53,200 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2021-06-12 22:12:53,445 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:12:54,052 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 107 [2021-06-12 22:12:54,560 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-06-12 22:12:55,284 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 108 [2021-06-12 22:12:55,501 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 22:12:56,128 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-12 22:12:56,326 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-12 22:12:56,690 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-12 22:12:57,131 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-12 22:12:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:57,362 INFO L93 Difference]: Finished difference Result 3399 states and 11009 transitions. [2021-06-12 22:12:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:12:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:57,367 INFO L225 Difference]: With dead ends: 3399 [2021-06-12 22:12:57,368 INFO L226 Difference]: Without dead ends: 3354 [2021-06-12 22:12:57,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6461.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2378, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:12:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-06-12 22:12:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2260. [2021-06-12 22:12:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.454183266932271) internal successors, (7803), 2259 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7803 transitions. [2021-06-12 22:12:57,399 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7803 transitions. Word has length 26 [2021-06-12 22:12:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:57,400 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 7803 transitions. [2021-06-12 22:12:57,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7803 transitions. [2021-06-12 22:12:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:57,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:57,402 INFO L472 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] [2021-06-12 22:12:57,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:57,603 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 45 times [2021-06-12 22:12:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648519278] [2021-06-12 22:12:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:57,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648519278] [2021-06-12 22:12:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648519278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233597902] [2021-06-12 22:12:57,870 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 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 [2021-06-12 22:12:57,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:57,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:12:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:58,135 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:12:58,305 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 22:12:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:58,448 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:12:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:12:58,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:58,478 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:58,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:12:58,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:58,884 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-06-12 22:12:58,884 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-12 22:12:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:58,907 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:58,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:12:58,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,082 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-12 22:12:59,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:12:59,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:12:59,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,451 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 144 [2021-06-12 22:12:59,451 INFO L628 ElimStorePlain]: treesize reduction 49, result has 87.8 percent of original size [2021-06-12 22:12:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,480 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:59,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:12:59,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,507 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:12:59,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,761 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-12 22:12:59,762 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.0 percent of original size [2021-06-12 22:12:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,783 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:59,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:12:59,785 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:59,899 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:12:59,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:59,922 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:12:59,926 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:00,072 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:13:00,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:00,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:00,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:13:00,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:00,197 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 22:13:00,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:00,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:00,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:13:00,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:00,413 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-06-12 22:13:00,414 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.4 percent of original size [2021-06-12 22:13:00,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:13:00,430 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-12 22:13:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:00,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233597902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:00,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:00,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:00,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082599931] [2021-06-12 22:13:00,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:00,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:00,582 INFO L87 Difference]: Start difference. First operand 2260 states and 7803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:00,892 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-12 22:13:01,758 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2021-06-12 22:13:02,293 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-12 22:13:02,625 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-12 22:13:02,991 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-12 22:13:03,386 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 112 [2021-06-12 22:13:03,804 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-12 22:13:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:04,072 INFO L93 Difference]: Finished difference Result 3654 states and 11998 transitions. [2021-06-12 22:13:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:13:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:04,078 INFO L225 Difference]: With dead ends: 3654 [2021-06-12 22:13:04,078 INFO L226 Difference]: Without dead ends: 3624 [2021-06-12 22:13:04,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3640.6ms TimeCoverageRelationStatistics Valid=385, Invalid=1255, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-06-12 22:13:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2265. [2021-06-12 22:13:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.4487632508833923) internal successors, (7808), 2264 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7808 transitions. [2021-06-12 22:13:04,113 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7808 transitions. Word has length 26 [2021-06-12 22:13:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:04,113 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 7808 transitions. [2021-06-12 22:13:04,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7808 transitions. [2021-06-12 22:13:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:04,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:04,117 INFO L472 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] [2021-06-12 22:13:04,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-12 22:13:04,317 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-06-12 22:13:04,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:04,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544574535] [2021-06-12 22:13:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544574535] [2021-06-12 22:13:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544574535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120708214] [2021-06-12 22:13:04,471 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 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 [2021-06-12 22:13:04,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:04,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:04,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:04,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:04,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:04,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:13:05,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:13:05,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:13:05,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:13:05,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:05,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:13:05,038 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:13:05,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:13:05,053 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:13:05,060 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:05,067 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:13:05,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:13:05,082 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:13:05,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:13:05,095 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:05,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:05,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:13:05,099 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:05,118 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:13:05,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:13:05,119 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:13:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:05,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120708214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:05,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:05,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:13:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575500432] [2021-06-12 22:13:05,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:05,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:05,145 INFO L87 Difference]: Start difference. First operand 2265 states and 7808 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:06,227 INFO L93 Difference]: Finished difference Result 3677 states and 11972 transitions. [2021-06-12 22:13:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:13:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:06,231 INFO L225 Difference]: With dead ends: 3677 [2021-06-12 22:13:06,231 INFO L226 Difference]: Without dead ends: 3647 [2021-06-12 22:13:06,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-12 22:13:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2319. [2021-06-12 22:13:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4516824849007763) internal successors, (8001), 2318 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 8001 transitions. [2021-06-12 22:13:06,267 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 8001 transitions. Word has length 26 [2021-06-12 22:13:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:06,267 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 8001 transitions. [2021-06-12 22:13:06,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 8001 transitions. [2021-06-12 22:13:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:06,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:06,270 INFO L472 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] [2021-06-12 22:13:06,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-06-12 22:13:06,471 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-06-12 22:13:06,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:06,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607279091] [2021-06-12 22:13:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:06,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:06,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607279091] [2021-06-12 22:13:06,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607279091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:06,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587074907] [2021-06-12 22:13:06,614 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 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 [2021-06-12 22:13:06,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:06,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,874 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:13:06,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:13:06,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-12 22:13:06,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 22:13:06,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:06,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:06,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:06,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-12 22:13:07,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,024 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:07,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,049 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-12 22:13:07,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 22:13:07,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,078 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:13:07,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-12 22:13:07,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,096 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:07,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,113 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:13:07,114 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,133 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:07,134 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,150 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:07,151 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,168 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:13:07,169 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,187 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:07,188 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,213 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:13:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:13:07,215 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,238 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:13:07,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 22:13:07,240 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,250 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:13:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:07,250 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,325 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-12 22:13:07,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:07,326 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-12 22:13:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587074907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:07,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:07,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:13:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253285895] [2021-06-12 22:13:07,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:07,416 INFO L87 Difference]: Start difference. First operand 2319 states and 8001 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:09,200 INFO L93 Difference]: Finished difference Result 3983 states and 12879 transitions. [2021-06-12 22:13:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:13:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:09,206 INFO L225 Difference]: With dead ends: 3983 [2021-06-12 22:13:09,207 INFO L226 Difference]: Without dead ends: 3939 [2021-06-12 22:13:09,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1636.4ms TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:13:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-12 22:13:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2319. [2021-06-12 22:13:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4490940465918896) internal successors, (7995), 2318 states have internal predecessors, (7995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 7995 transitions. [2021-06-12 22:13:09,247 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 7995 transitions. Word has length 26 [2021-06-12 22:13:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:09,248 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 7995 transitions. [2021-06-12 22:13:09,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 7995 transitions. [2021-06-12 22:13:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:09,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:09,250 INFO L472 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] [2021-06-12 22:13:09,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:09,451 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 46 times [2021-06-12 22:13:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:09,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195212878] [2021-06-12 22:13:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:09,750 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-12 22:13:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:09,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195212878] [2021-06-12 22:13:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195212878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619803440] [2021-06-12 22:13:09,878 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 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 [2021-06-12 22:13:09,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:13:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:10,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 22:13:10,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 22:13:10,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:10,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 22:13:10,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:10,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:13:10,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,192 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:13:10,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:10,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,216 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 39 treesize of output 19 [2021-06-12 22:13:10,217 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,229 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 39 treesize of output 1 [2021-06-12 22:13:10,229 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:13:10,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:10,253 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:13:10,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:10,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 22:13:10,281 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,291 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:13:10,292 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-12 22:13:10,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:10,310 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:10,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:10,310 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:10,384 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-12 22:13:10,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:13:10,385 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-12 22:13:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:10,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619803440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:10,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:10,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:13:10,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018921236] [2021-06-12 22:13:10,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:10,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:10,478 INFO L87 Difference]: Start difference. First operand 2319 states and 7995 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:11,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-12 22:13:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:12,315 INFO L93 Difference]: Finished difference Result 3035 states and 10159 transitions. [2021-06-12 22:13:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:13:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:12,320 INFO L225 Difference]: With dead ends: 3035 [2021-06-12 22:13:12,320 INFO L226 Difference]: Without dead ends: 3005 [2021-06-12 22:13:12,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1790.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:13:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-12 22:13:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2314. [2021-06-12 22:13:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.4466061392131433) internal successors, (7972), 2313 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7972 transitions. [2021-06-12 22:13:12,352 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7972 transitions. Word has length 26 [2021-06-12 22:13:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:12,352 INFO L482 AbstractCegarLoop]: Abstraction has 2314 states and 7972 transitions. [2021-06-12 22:13:12,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7972 transitions. [2021-06-12 22:13:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:12,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:12,355 INFO L472 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] [2021-06-12 22:13:12,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3391,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:12,555 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-12 22:13:12,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:12,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896482007] [2021-06-12 22:13:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:12,761 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-12 22:13:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:12,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:12,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896482007] [2021-06-12 22:13:12,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896482007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:12,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454488682] [2021-06-12 22:13:12,903 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 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 [2021-06-12 22:13:12,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:13:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:13,268 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-12 22:13:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:13:13,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:13,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:13:13,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:13,726 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-12 22:13:13,726 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-12 22:13:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:13,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:13:13,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:13:13,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:13,891 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:13:13,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:13:13,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:13,919 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:13:13,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,043 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:13:14,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,056 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:14,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:13:14,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:13:14,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,182 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:13:14,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:13:14,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:14,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:13:14,207 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:14,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:13:14,310 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-12 22:13:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:14,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454488682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:14,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:14,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:14,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709110142] [2021-06-12 22:13:14,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:14,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:14,439 INFO L87 Difference]: Start difference. First operand 2314 states and 7972 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:15,685 INFO L93 Difference]: Finished difference Result 3062 states and 10279 transitions. [2021-06-12 22:13:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:13:15,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:15,690 INFO L225 Difference]: With dead ends: 3062 [2021-06-12 22:13:15,690 INFO L226 Difference]: Without dead ends: 3037 [2021-06-12 22:13:15,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1446.2ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-06-12 22:13:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2304. [2021-06-12 22:13:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.449413808076422) internal successors, (7944), 2303 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 7944 transitions. [2021-06-12 22:13:15,721 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 7944 transitions. Word has length 26 [2021-06-12 22:13:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:15,721 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 7944 transitions. [2021-06-12 22:13:15,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 7944 transitions. [2021-06-12 22:13:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:15,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:15,724 INFO L472 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] [2021-06-12 22:13:15,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:15,924 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-06-12 22:13:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329979177] [2021-06-12 22:13:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:16,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329979177] [2021-06-12 22:13:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329979177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056927882] [2021-06-12 22:13:16,100 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 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 [2021-06-12 22:13:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:13:16,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:13:16,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:16,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:13:16,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:13:16,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:13:16,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:13:16,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,626 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:13:16,627 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:13:16,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:13:16,643 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:13:16,651 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:13:16,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:13:16,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:13:16,674 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:13:16,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:16,697 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:13:16,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:13:16,698 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-12 22:13:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:16,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056927882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:16,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:16,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:13:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144648195] [2021-06-12 22:13:16,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:16,720 INFO L87 Difference]: Start difference. First operand 2304 states and 7944 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:18,086 INFO L93 Difference]: Finished difference Result 3206 states and 10682 transitions. [2021-06-12 22:13:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:13:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:18,091 INFO L225 Difference]: With dead ends: 3206 [2021-06-12 22:13:18,091 INFO L226 Difference]: Without dead ends: 3169 [2021-06-12 22:13:18,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1323.0ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:13:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-12 22:13:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2344. [2021-06-12 22:13:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.452838241570636) internal successors, (8090), 2343 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8090 transitions. [2021-06-12 22:13:18,122 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8090 transitions. Word has length 26 [2021-06-12 22:13:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:18,122 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8090 transitions. [2021-06-12 22:13:18,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8090 transitions. [2021-06-12 22:13:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:18,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:18,124 INFO L472 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] [2021-06-12 22:13:18,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:18,325 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-06-12 22:13:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:18,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530446928] [2021-06-12 22:13:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:18,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:18,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530446928] [2021-06-12 22:13:18,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530446928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:18,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824131772] [2021-06-12 22:13:18,505 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 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 [2021-06-12 22:13:18,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:18,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:18,834 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-12 22:13:18,879 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_401, v_prenex_403], 5=[A, v_prenex_399]} [2021-06-12 22:13:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:13:18,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,967 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.6 percent of original size [2021-06-12 22:13:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:13:18,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:13:19,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:19,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:13:19,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:19,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:19,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:19,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:31 [2021-06-12 22:13:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824131772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:19,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:19,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:13:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449548247] [2021-06-12 22:13:19,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:19,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:19,090 INFO L87 Difference]: Start difference. First operand 2344 states and 8090 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:20,898 INFO L93 Difference]: Finished difference Result 3360 states and 11166 transitions. [2021-06-12 22:13:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:13:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:20,902 INFO L225 Difference]: With dead ends: 3360 [2021-06-12 22:13:20,902 INFO L226 Difference]: Without dead ends: 3326 [2021-06-12 22:13:20,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1654.3ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:13:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-12 22:13:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2364. [2021-06-12 22:13:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 3.446043165467626) internal successors, (8143), 2363 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 8143 transitions. [2021-06-12 22:13:20,932 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 8143 transitions. Word has length 26 [2021-06-12 22:13:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:20,932 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 8143 transitions. [2021-06-12 22:13:20,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 8143 transitions. [2021-06-12 22:13:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:20,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:20,935 INFO L472 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] [2021-06-12 22:13:21,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-06-12 22:13:21,135 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:21,135 INFO L82 PathProgramCache]: Analyzing trace with hash 256075815, now seen corresponding path program 48 times [2021-06-12 22:13:21,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:21,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412739397] [2021-06-12 22:13:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:21,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412739397] [2021-06-12 22:13:21,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412739397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975677165] [2021-06-12 22:13:21,421 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 [2021-06-12 22:13:21,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:21,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:13:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:21,953 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:13:22,403 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_437, v_prenex_427, A, v_prenex_439, v_prenex_428, v_prenex_431, v_prenex_432, v_prenex_421, v_prenex_423, v_prenex_435], 3=[v_prenex_422, v_prenex_425]} [2021-06-12 22:13:22,433 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:22,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:13:22,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,782 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 147 [2021-06-12 22:13:22,783 INFO L628 ElimStorePlain]: treesize reduction 122, result has 76.9 percent of original size [2021-06-12 22:13:22,783 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-06-12 22:13:22,807 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-12 22:13:22,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,962 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-12 22:13:22,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:13:22,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,132 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-12 22:13:23,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,154 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:13:23,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,298 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-12 22:13:23,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-06-12 22:13:23,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:13:23,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,466 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-12 22:13:23,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,496 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:13:23,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,644 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 22:13:23,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,667 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:23,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:13:23,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,812 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:13:23,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,842 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:23,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:13:23,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:23,986 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:13:23,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:23,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:24,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 28 [2021-06-12 22:13:24,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:24,146 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:13:24,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:24,177 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:13:24,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-12 22:13:24,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:24,325 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:13:24,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:24,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:13:24,340 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:490 [2021-06-12 22:13:24,545 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-12 22:13:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:24,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975677165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:24,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:24,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:13:24,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127172332] [2021-06-12 22:13:24,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:13:24,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:13:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:24,651 INFO L87 Difference]: Start difference. First operand 2364 states and 8143 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:25,264 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-12 22:13:26,195 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-12 22:13:26,558 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-12 22:13:26,908 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 22:13:27,151 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:13:27,405 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-12 22:13:27,637 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:13:28,252 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-06-12 22:13:28,513 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-06-12 22:13:29,295 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2021-06-12 22:13:29,837 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-12 22:13:30,078 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-12 22:13:30,259 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-06-12 22:13:30,431 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-06-12 22:13:30,593 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 30 [2021-06-12 22:13:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:30,803 INFO L93 Difference]: Finished difference Result 3432 states and 11237 transitions. [2021-06-12 22:13:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:13:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:30,808 INFO L225 Difference]: With dead ends: 3432 [2021-06-12 22:13:30,808 INFO L226 Difference]: Without dead ends: 3387 [2021-06-12 22:13:30,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 6059.6ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:13:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2021-06-12 22:13:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2369. [2021-06-12 22:13:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.4451013513513513) internal successors, (8158), 2368 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 8158 transitions. [2021-06-12 22:13:30,836 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 8158 transitions. Word has length 26 [2021-06-12 22:13:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:30,836 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 8158 transitions. [2021-06-12 22:13:30,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 8158 transitions. [2021-06-12 22:13:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:30,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:30,839 INFO L472 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] [2021-06-12 22:13:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-12 22:13:31,041 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1128567001, now seen corresponding path program 49 times [2021-06-12 22:13:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59729114] [2021-06-12 22:13:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:31,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59729114] [2021-06-12 22:13:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59729114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008469608] [2021-06-12 22:13:31,330 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 [2021-06-12 22:13:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:31,771 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 22:13:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:31,987 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:13:31,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:31,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:32,013 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:13:32,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:32,406 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-06-12 22:13:32,407 INFO L628 ElimStorePlain]: treesize reduction 76, result has 84.7 percent of original size [2021-06-12 22:13:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:32,432 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:32,432 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 26 treesize of output 28 [2021-06-12 22:13:32,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:32,609 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 22:13:32,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:32,638 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-12 22:13:32,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:32,663 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:32,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:13:32,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:32,968 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-06-12 22:13:32,969 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.6 percent of original size [2021-06-12 22:13:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:32,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-12 22:13:32,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,019 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:13:33,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,270 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2021-06-12 22:13:33,271 INFO L628 ElimStorePlain]: treesize reduction 49, result has 85.8 percent of original size [2021-06-12 22:13:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:13:33,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,527 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2021-06-12 22:13:33,527 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-06-12 22:13:33,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,547 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:13:33,549 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,651 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:13:33,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:13:33,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,779 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:13:33,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,798 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:33,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:13:33,800 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:33,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:13:33,909 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-12 22:13:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:34,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008469608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:34,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:34,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258630262] [2021-06-12 22:13:34,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:34,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:34,056 INFO L87 Difference]: Start difference. First operand 2369 states and 8158 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:34,417 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-12 22:13:35,321 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 22:13:35,512 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 22:13:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:35,768 INFO L93 Difference]: Finished difference Result 3462 states and 11530 transitions. [2021-06-12 22:13:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:13:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:35,773 INFO L225 Difference]: With dead ends: 3462 [2021-06-12 22:13:35,773 INFO L226 Difference]: Without dead ends: 3432 [2021-06-12 22:13:35,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2003.3ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-06-12 22:13:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2352. [2021-06-12 22:13:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.441514249255636) internal successors, (8091), 2351 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8091 transitions. [2021-06-12 22:13:35,805 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8091 transitions. Word has length 26 [2021-06-12 22:13:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:35,805 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8091 transitions. [2021-06-12 22:13:35,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8091 transitions. [2021-06-12 22:13:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:35,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:35,807 INFO L472 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] [2021-06-12 22:13:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3598 [2021-06-12 22:13:36,013 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 50 times [2021-06-12 22:13:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932703719] [2021-06-12 22:13:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932703719] [2021-06-12 22:13:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932703719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406082152] [2021-06-12 22:13:36,301 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 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 [2021-06-12 22:13:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:13:36,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:36,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:13:36,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:13:36,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:13:36,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:36,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 22:13:36,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,563 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:13:36,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:13:36,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 22:13:36,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:13:36,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,609 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:13:36,610 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,619 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 19 [2021-06-12 22:13:36,620 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,629 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 1 [2021-06-12 22:13:36,629 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,638 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,638 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 1 [2021-06-12 22:13:36,639 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:13:36,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:36,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:13:36,661 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:36,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:36,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-12 22:13:36,667 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,733 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-12 22:13:36,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:13:36,734 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-12 22:13:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406082152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:36,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:13:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809087866] [2021-06-12 22:13:36,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:36,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:36,833 INFO L87 Difference]: Start difference. First operand 2352 states and 8091 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:37,796 INFO L93 Difference]: Finished difference Result 3124 states and 10478 transitions. [2021-06-12 22:13:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:13:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:37,801 INFO L225 Difference]: With dead ends: 3124 [2021-06-12 22:13:37,801 INFO L226 Difference]: Without dead ends: 3099 [2021-06-12 22:13:37,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1007.3ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:13:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-06-12 22:13:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2339. [2021-06-12 22:13:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.441830624465355) internal successors, (8047), 2338 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8047 transitions. [2021-06-12 22:13:37,830 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8047 transitions. Word has length 26 [2021-06-12 22:13:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:37,830 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 8047 transitions. [2021-06-12 22:13:37,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8047 transitions. [2021-06-12 22:13:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:37,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:37,833 INFO L472 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] [2021-06-12 22:13:38,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3645,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:38,038 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-12 22:13:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:38,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758950881] [2021-06-12 22:13:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:38,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:38,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758950881] [2021-06-12 22:13:38,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758950881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:38,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323976603] [2021-06-12 22:13:38,404 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 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 [2021-06-12 22:13:38,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:38,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:38,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:13:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:38,765 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 22:13:38,925 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_481, v_prenex_482, v_prenex_478], 3=[v_prenex_480]} [2021-06-12 22:13:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:38,940 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:38,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:13:38,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:38,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:38,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:13:38,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,281 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-12 22:13:39,282 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-06-12 22:13:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:39,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:13:39,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:13:39,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,459 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:13:39,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:13:39,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,500 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:13:39,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,639 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:13:39,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:13:39,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,665 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 22:13:39,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,794 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 22:13:39,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,807 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:13:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:13:39,808 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:13:39,820 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:13:39,925 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:186 [2021-06-12 22:13:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:40,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323976603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:40,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:40,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926978242] [2021-06-12 22:13:40,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:40,061 INFO L87 Difference]: Start difference. First operand 2339 states and 8047 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:40,784 INFO L93 Difference]: Finished difference Result 2991 states and 10107 transitions. [2021-06-12 22:13:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:13:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:40,789 INFO L225 Difference]: With dead ends: 2991 [2021-06-12 22:13:40,789 INFO L226 Difference]: Without dead ends: 2976 [2021-06-12 22:13:40,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:13:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-12 22:13:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2333. [2021-06-12 22:13:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 3.442967409948542) internal successors, (8029), 2332 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 8029 transitions. [2021-06-12 22:13:40,820 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 8029 transitions. Word has length 26 [2021-06-12 22:13:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:40,820 INFO L482 AbstractCegarLoop]: Abstraction has 2333 states and 8029 transitions. [2021-06-12 22:13:40,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 8029 transitions. [2021-06-12 22:13:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:40,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:40,822 INFO L472 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] [2021-06-12 22:13:41,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3664,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:41,023 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-06-12 22:13:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:41,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017962264] [2021-06-12 22:13:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:41,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:41,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017962264] [2021-06-12 22:13:41,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017962264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:41,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990012404] [2021-06-12 22:13:41,200 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 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 [2021-06-12 22:13:41,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:41,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:13:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,681 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:41,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 22:13:41,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,712 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:13:41,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,730 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:41,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,753 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:13:41,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-12 22:13:41,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,771 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:13:41,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,794 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:13:41,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:13:41,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,811 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-12 22:13:41,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,837 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:13:41,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,860 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:13:41,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 22:13:41,862 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,884 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:13:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-12 22:13:41,886 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,908 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:13:41,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 22:13:41,910 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,931 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-12 22:13:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-12 22:13:41,933 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,950 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:13:41,950 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:41,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 22:13:41,978 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,992 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:41,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:13:41,993 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:41,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:42,000 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:13:42,001 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:42,087 INFO L628 ElimStorePlain]: treesize reduction 105, result has 47.0 percent of original size [2021-06-12 22:13:42,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:13:42,089 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-12 22:13:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990012404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:42,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:13:42,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600691805] [2021-06-12 22:13:42,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:13:42,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:42,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:13:42,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:42,163 INFO L87 Difference]: Start difference. First operand 2333 states and 8029 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:43,872 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-06-12 22:13:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:44,564 INFO L93 Difference]: Finished difference Result 3591 states and 11838 transitions. [2021-06-12 22:13:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:13:44,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:44,570 INFO L225 Difference]: With dead ends: 3591 [2021-06-12 22:13:44,570 INFO L226 Difference]: Without dead ends: 3547 [2021-06-12 22:13:44,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2145.1ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:13:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-06-12 22:13:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2360. [2021-06-12 22:13:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-12 22:13:44,604 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-12 22:13:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:44,604 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-12 22:13:44,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-12 22:13:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:44,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:44,607 INFO L472 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] [2021-06-12 22:13:44,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:44,808 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 64 times [2021-06-12 22:13:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:44,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540267119] [2021-06-12 22:13:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540267119] [2021-06-12 22:13:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540267119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133763153] [2021-06-12 22:13:45,101 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 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 [2021-06-12 22:13:45,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:13:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:45,469 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_486], 5=[v_prenex_487, v_prenex_488]} [2021-06-12 22:13:45,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:45,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:13:45,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:45,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:13:45,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:45,554 INFO L628 ElimStorePlain]: treesize reduction 130, result has 41.2 percent of original size [2021-06-12 22:13:45,555 INFO L518 ElimStorePlain]: Eliminatee v_prenex_486 vanished before elimination [2021-06-12 22:13:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:13:45,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:45,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:45,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:45,603 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 27 treesize of output 13 [2021-06-12 22:13:45,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:45,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:45,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:13:45,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:24 [2021-06-12 22:13:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:45,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133763153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:45,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:45,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:13:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101727652] [2021-06-12 22:13:45,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:45,661 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:46,928 INFO L93 Difference]: Finished difference Result 3132 states and 10494 transitions. [2021-06-12 22:13:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:13:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:46,932 INFO L225 Difference]: With dead ends: 3132 [2021-06-12 22:13:46,932 INFO L226 Difference]: Without dead ends: 3117 [2021-06-12 22:13:46,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1215.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:13:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-06-12 22:13:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2360. [2021-06-12 22:13:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-12 22:13:46,961 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-12 22:13:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:46,962 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-12 22:13:46,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-12 22:13:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:46,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:46,964 INFO L472 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] [2021-06-12 22:13:47,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-12 22:13:47,169 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1440707985, now seen corresponding path program 65 times [2021-06-12 22:13:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281612052] [2021-06-12 22:13:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:47,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281612052] [2021-06-12 22:13:47,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281612052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218405420] [2021-06-12 22:13:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:13:47,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:13:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:47,730 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:13:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,029 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:13:48,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-12 22:13:48,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,127 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:13:48,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-12 22:13:48,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:48,538 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 22:13:48,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 22:13:48,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:48,614 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:13:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-12 22:13:48,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:49,016 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 22:13:49,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-12 22:13:49,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,074 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:13:49,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:49,427 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-12 22:13:49,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,460 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:13:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-12 22:13:49,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:49,490 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:49,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:13:49,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,101 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2021-06-12 22:13:50,102 INFO L628 ElimStorePlain]: treesize reduction 31, result has 95.0 percent of original size [2021-06-12 22:13:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,132 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:13:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 22:13:50,133 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,161 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:50,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-12 22:13:50,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,450 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:13:50,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:50,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,481 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:13:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:13:50,483 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,510 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:13:50,514 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:51,018 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2021-06-12 22:13:51,019 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.4 percent of original size [2021-06-12 22:13:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:51,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-12 22:13:51,055 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,084 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:13:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 22:13:51,089 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:51,737 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2021-06-12 22:13:51,738 INFO L628 ElimStorePlain]: treesize reduction 40, result has 91.2 percent of original size [2021-06-12 22:13:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,766 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:13:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 22:13:51,768 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:51,792 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 22:13:51,796 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:52,015 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 22:13:52,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:52,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-12 22:13:52,029 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:422 [2021-06-12 22:13:52,191 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-06-12 22:13:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:52,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218405420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:52,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:52,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:13:52,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771243795] [2021-06-12 22:13:52,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:52,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:52,275 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:52,740 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-12 22:13:53,140 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 22:13:53,327 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 22:13:58,901 WARN L205 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-06-12 22:13:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:59,444 INFO L93 Difference]: Finished difference Result 3258 states and 10844 transitions. [2021-06-12 22:13:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:13:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:59,449 INFO L225 Difference]: With dead ends: 3258 [2021-06-12 22:13:59,450 INFO L226 Difference]: Without dead ends: 3228 [2021-06-12 22:13:59,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 7089.0ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:13:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-12 22:13:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2352. [2021-06-12 22:13:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.442364951084645) internal successors, (8093), 2351 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8093 transitions. [2021-06-12 22:13:59,481 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8093 transitions. Word has length 26 [2021-06-12 22:13:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:59,481 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8093 transitions. [2021-06-12 22:13:59,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8093 transitions. [2021-06-12 22:13:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:59,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:59,484 INFO L472 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] [2021-06-12 22:13:59,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:59,686 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-12 22:13:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:59,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769418097] [2021-06-12 22:13:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:59,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769418097] [2021-06-12 22:13:59,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769418097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812706195] [2021-06-12 22:13:59,725 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 [2021-06-12 22:13:59,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:59,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812706195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:59,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:59,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:13:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050289943] [2021-06-12 22:13:59,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:59,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:59,838 INFO L87 Difference]: Start difference. First operand 2352 states and 8093 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) [2021-06-12 22:14:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:00,767 INFO L93 Difference]: Finished difference Result 5410 states and 16973 transitions. [2021-06-12 22:14:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:14:00,767 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 [2021-06-12 22:14:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:00,774 INFO L225 Difference]: With dead ends: 5410 [2021-06-12 22:14:00,774 INFO L226 Difference]: Without dead ends: 5410 [2021-06-12 22:14:00,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:14:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2021-06-12 22:14:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 2548. [2021-06-12 22:14:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 3.486062033765214) internal successors, (8879), 2547 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 8879 transitions. [2021-06-12 22:14:00,816 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 8879 transitions. Word has length 28 [2021-06-12 22:14:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:00,817 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 8879 transitions. [2021-06-12 22:14:00,817 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) [2021-06-12 22:14:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 8879 transitions. [2021-06-12 22:14:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:00,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:00,819 INFO L472 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] [2021-06-12 22:14:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:01,020 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-12 22:14:01,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:01,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642539407] [2021-06-12 22:14:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:01,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642539407] [2021-06-12 22:14:01,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642539407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887844529] [2021-06-12 22:14:01,059 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 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 [2021-06-12 22:14:01,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:01,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:01,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887844529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:01,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:01,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:01,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594204563] [2021-06-12 22:14:01,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:01,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:01,185 INFO L87 Difference]: Start difference. First operand 2548 states and 8879 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) [2021-06-12 22:14:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:02,401 INFO L93 Difference]: Finished difference Result 7046 states and 21713 transitions. [2021-06-12 22:14:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:14:02,402 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 [2021-06-12 22:14:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:02,412 INFO L225 Difference]: With dead ends: 7046 [2021-06-12 22:14:02,412 INFO L226 Difference]: Without dead ends: 7046 [2021-06-12 22:14:02,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:14:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-06-12 22:14:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 2559. [2021-06-12 22:14:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 3.492181391712275) internal successors, (8933), 2558 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 8933 transitions. [2021-06-12 22:14:02,472 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 8933 transitions. Word has length 28 [2021-06-12 22:14:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:02,472 INFO L482 AbstractCegarLoop]: Abstraction has 2559 states and 8933 transitions. [2021-06-12 22:14:02,472 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) [2021-06-12 22:14:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 8933 transitions. [2021-06-12 22:14:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:02,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:02,475 INFO L472 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] [2021-06-12 22:14:02,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-12 22:14:02,683 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-12 22:14:02,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:02,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945624454] [2021-06-12 22:14:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:02,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:02,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945624454] [2021-06-12 22:14:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945624454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:02,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448029422] [2021-06-12 22:14:02,722 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 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 [2021-06-12 22:14:02,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:02,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448029422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:02,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:02,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847185030] [2021-06-12 22:14:02,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:02,847 INFO L87 Difference]: Start difference. First operand 2559 states and 8933 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) [2021-06-12 22:14:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:03,964 INFO L93 Difference]: Finished difference Result 6437 states and 20239 transitions. [2021-06-12 22:14:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:14:03,964 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 [2021-06-12 22:14:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:03,973 INFO L225 Difference]: With dead ends: 6437 [2021-06-12 22:14:03,973 INFO L226 Difference]: Without dead ends: 6437 [2021-06-12 22:14:03,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:14:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-06-12 22:14:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 2507. [2021-06-12 22:14:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 3.4720670391061454) internal successors, (8701), 2506 states have internal predecessors, (8701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 8701 transitions. [2021-06-12 22:14:04,025 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 8701 transitions. Word has length 28 [2021-06-12 22:14:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:04,025 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 8701 transitions. [2021-06-12 22:14:04,025 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) [2021-06-12 22:14:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 8701 transitions. [2021-06-12 22:14:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:04,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:04,028 INFO L472 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] [2021-06-12 22:14:04,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3903 [2021-06-12 22:14:04,228 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:04,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-12 22:14:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:04,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145280263] [2021-06-12 22:14:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145280263] [2021-06-12 22:14:04,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145280263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642132478] [2021-06-12 22:14:04,278 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 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 [2021-06-12 22:14:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642132478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:04,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:04,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030040913] [2021-06-12 22:14:04,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:04,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:04,400 INFO L87 Difference]: Start difference. First operand 2507 states and 8701 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) [2021-06-12 22:14:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:05,457 INFO L93 Difference]: Finished difference Result 5496 states and 17140 transitions. [2021-06-12 22:14:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:14:05,458 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 [2021-06-12 22:14:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:05,465 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 22:14:05,466 INFO L226 Difference]: Without dead ends: 5496 [2021-06-12 22:14:05,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:14:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-12 22:14:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 2522. [2021-06-12 22:14:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 3.4668782229274098) internal successors, (8740), 2521 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 8740 transitions. [2021-06-12 22:14:05,512 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 8740 transitions. Word has length 28 [2021-06-12 22:14:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:05,512 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 8740 transitions. [2021-06-12 22:14:05,512 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) [2021-06-12 22:14:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 8740 transitions. [2021-06-12 22:14:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:05,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:05,515 INFO L472 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] [2021-06-12 22:14:05,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:05,716 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 66 times [2021-06-12 22:14:05,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:05,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58846014] [2021-06-12 22:14:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:05,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:05,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58846014] [2021-06-12 22:14:05,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58846014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:05,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405368920] [2021-06-12 22:14:05,759 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 [2021-06-12 22:14:05,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:05,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405368920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:05,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:05,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:14:05,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029007418] [2021-06-12 22:14:05,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:05,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:05,868 INFO L87 Difference]: Start difference. First operand 2522 states and 8740 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) [2021-06-12 22:14:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:06,414 INFO L93 Difference]: Finished difference Result 4908 states and 15515 transitions. [2021-06-12 22:14:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:14:06,414 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 [2021-06-12 22:14:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:06,420 INFO L225 Difference]: With dead ends: 4908 [2021-06-12 22:14:06,420 INFO L226 Difference]: Without dead ends: 4908 [2021-06-12 22:14:06,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:14:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2021-06-12 22:14:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 2592. [2021-06-12 22:14:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.4515631030490157) internal successors, (8943), 2591 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 8943 transitions. [2021-06-12 22:14:06,474 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 8943 transitions. Word has length 28 [2021-06-12 22:14:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:06,474 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 8943 transitions. [2021-06-12 22:14:06,474 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) [2021-06-12 22:14:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 8943 transitions. [2021-06-12 22:14:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:06,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:06,478 INFO L472 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] [2021-06-12 22:14:06,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3905 [2021-06-12 22:14:06,678 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-12 22:14:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:06,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147823462] [2021-06-12 22:14:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:06,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:06,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147823462] [2021-06-12 22:14:06,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147823462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:06,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246484435] [2021-06-12 22:14:06,705 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 [2021-06-12 22:14:06,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:06,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:14:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:06,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246484435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:06,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:06,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:14:06,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294717339] [2021-06-12 22:14:06,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:14:06,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:14:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:14:06,784 INFO L87 Difference]: Start difference. First operand 2592 states and 8943 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) [2021-06-12 22:14:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:06,958 INFO L93 Difference]: Finished difference Result 4133 states and 13562 transitions. [2021-06-12 22:14:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:14:06,959 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 [2021-06-12 22:14:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:06,965 INFO L225 Difference]: With dead ends: 4133 [2021-06-12 22:14:06,965 INFO L226 Difference]: Without dead ends: 4085 [2021-06-12 22:14:06,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-12 22:14:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2922. [2021-06-12 22:14:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.501198219787744) internal successors, (10227), 2921 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10227 transitions. [2021-06-12 22:14:07,009 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10227 transitions. Word has length 28 [2021-06-12 22:14:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:07,009 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10227 transitions. [2021-06-12 22:14:07,009 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) [2021-06-12 22:14:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10227 transitions. [2021-06-12 22:14:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:07,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:07,013 INFO L472 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] [2021-06-12 22:14:07,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:07,213 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-12 22:14:07,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:07,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407745009] [2021-06-12 22:14:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:07,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:07,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407745009] [2021-06-12 22:14:07,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407745009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:07,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536222705] [2021-06-12 22:14:07,246 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 [2021-06-12 22:14:07,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:14:07,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:07,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536222705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:07,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:07,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:14:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193655539] [2021-06-12 22:14:07,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:07,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:07,351 INFO L87 Difference]: Start difference. First operand 2922 states and 10227 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) [2021-06-12 22:14:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:07,918 INFO L93 Difference]: Finished difference Result 4714 states and 15191 transitions. [2021-06-12 22:14:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:14:07,918 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 [2021-06-12 22:14:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:07,937 INFO L225 Difference]: With dead ends: 4714 [2021-06-12 22:14:07,937 INFO L226 Difference]: Without dead ends: 4667 [2021-06-12 22:14:07,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:14:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-12 22:14:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3096. [2021-06-12 22:14:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 3.5150242326332797) internal successors, (10879), 3095 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 10879 transitions. [2021-06-12 22:14:07,982 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 10879 transitions. Word has length 28 [2021-06-12 22:14:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:07,982 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 10879 transitions. [2021-06-12 22:14:07,983 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) [2021-06-12 22:14:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 10879 transitions. [2021-06-12 22:14:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:07,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:07,987 INFO L472 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] [2021-06-12 22:14:08,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-06-12 22:14:08,187 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-12 22:14:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:08,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594876683] [2021-06-12 22:14:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:08,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594876683] [2021-06-12 22:14:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594876683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718160839] [2021-06-12 22:14:08,220 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 [2021-06-12 22:14:08,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:08,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718160839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:08,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:08,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641672959] [2021-06-12 22:14:08,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:08,329 INFO L87 Difference]: Start difference. First operand 3096 states and 10879 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) [2021-06-12 22:14:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:08,988 INFO L93 Difference]: Finished difference Result 5031 states and 15895 transitions. [2021-06-12 22:14:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:14:08,988 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 [2021-06-12 22:14:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:08,996 INFO L225 Difference]: With dead ends: 5031 [2021-06-12 22:14:08,996 INFO L226 Difference]: Without dead ends: 5005 [2021-06-12 22:14:08,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:14:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2021-06-12 22:14:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3120. [2021-06-12 22:14:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 3.521000320615582) internal successors, (10982), 3119 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 10982 transitions. [2021-06-12 22:14:09,058 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 10982 transitions. Word has length 28 [2021-06-12 22:14:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:09,058 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 10982 transitions. [2021-06-12 22:14:09,058 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) [2021-06-12 22:14:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 10982 transitions. [2021-06-12 22:14:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:09,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:09,063 INFO L472 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] [2021-06-12 22:14:09,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3908 [2021-06-12 22:14:09,277 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-12 22:14:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:09,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664576048] [2021-06-12 22:14:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:09,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:09,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664576048] [2021-06-12 22:14:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664576048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:09,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419844355] [2021-06-12 22:14:09,309 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 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 [2021-06-12 22:14:09,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:09,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:09,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419844355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:09,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:09,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517254369] [2021-06-12 22:14:09,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:09,436 INFO L87 Difference]: Start difference. First operand 3120 states and 10982 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) [2021-06-12 22:14:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:10,120 INFO L93 Difference]: Finished difference Result 5035 states and 15933 transitions. [2021-06-12 22:14:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:14:10,120 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 [2021-06-12 22:14:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:10,129 INFO L225 Difference]: With dead ends: 5035 [2021-06-12 22:14:10,129 INFO L226 Difference]: Without dead ends: 5029 [2021-06-12 22:14:10,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:14:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2021-06-12 22:14:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 3123. [2021-06-12 22:14:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.5153747597693785) internal successors, (10975), 3122 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10975 transitions. [2021-06-12 22:14:10,197 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10975 transitions. Word has length 28 [2021-06-12 22:14:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:10,216 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10975 transitions. [2021-06-12 22:14:10,217 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) [2021-06-12 22:14:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10975 transitions. [2021-06-12 22:14:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:10,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:10,221 INFO L472 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] [2021-06-12 22:14:10,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:10,431 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-12 22:14:10,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:10,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347904575] [2021-06-12 22:14:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:10,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:10,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347904575] [2021-06-12 22:14:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347904575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:10,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521179399] [2021-06-12 22:14:10,463 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 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 [2021-06-12 22:14:10,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:14:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:10,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521179399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:10,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:10,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271692914] [2021-06-12 22:14:10,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:10,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:10,554 INFO L87 Difference]: Start difference. First operand 3123 states and 10975 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) [2021-06-12 22:14:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:11,125 INFO L93 Difference]: Finished difference Result 5805 states and 18700 transitions. [2021-06-12 22:14:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:14:11,126 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 [2021-06-12 22:14:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:11,134 INFO L225 Difference]: With dead ends: 5805 [2021-06-12 22:14:11,134 INFO L226 Difference]: Without dead ends: 5722 [2021-06-12 22:14:11,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:14:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2021-06-12 22:14:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 3270. [2021-06-12 22:14:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 3.5460385438972164) internal successors, (11592), 3269 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 11592 transitions. [2021-06-12 22:14:11,199 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 11592 transitions. Word has length 28 [2021-06-12 22:14:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:11,200 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 11592 transitions. [2021-06-12 22:14:11,200 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) [2021-06-12 22:14:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 11592 transitions. [2021-06-12 22:14:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:11,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:11,205 INFO L472 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] [2021-06-12 22:14:11,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3910,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:11,405 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-12 22:14:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:11,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55607531] [2021-06-12 22:14:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:11,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55607531] [2021-06-12 22:14:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55607531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111353100] [2021-06-12 22:14:11,441 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 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 [2021-06-12 22:14:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:14:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111353100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:11,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:11,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:14:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687997125] [2021-06-12 22:14:11,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:14:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:14:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:14:11,521 INFO L87 Difference]: Start difference. First operand 3270 states and 11592 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) [2021-06-12 22:14:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:11,672 INFO L93 Difference]: Finished difference Result 4551 states and 15064 transitions. [2021-06-12 22:14:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:14:11,672 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 [2021-06-12 22:14:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:11,677 INFO L225 Difference]: With dead ends: 4551 [2021-06-12 22:14:11,678 INFO L226 Difference]: Without dead ends: 4551 [2021-06-12 22:14:11,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:14:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-12 22:14:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3038. [2021-06-12 22:14:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.5284820546592033) internal successors, (10716), 3037 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10716 transitions. [2021-06-12 22:14:11,721 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10716 transitions. Word has length 28 [2021-06-12 22:14:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:11,721 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10716 transitions. [2021-06-12 22:14:11,721 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) [2021-06-12 22:14:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10716 transitions. [2021-06-12 22:14:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:11,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:11,725 INFO L472 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] [2021-06-12 22:14:11,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-12 22:14:11,925 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-12 22:14:11,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:11,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339379967] [2021-06-12 22:14:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:11,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:11,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339379967] [2021-06-12 22:14:11,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339379967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:11,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224065967] [2021-06-12 22:14:11,959 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 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 [2021-06-12 22:14:11,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:11,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:11,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:12,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224065967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:12,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:12,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:12,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985258413] [2021-06-12 22:14:12,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:12,060 INFO L87 Difference]: Start difference. First operand 3038 states and 10716 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) [2021-06-12 22:14:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:12,691 INFO L93 Difference]: Finished difference Result 6432 states and 20472 transitions. [2021-06-12 22:14:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:14:12,691 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 [2021-06-12 22:14:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:12,700 INFO L225 Difference]: With dead ends: 6432 [2021-06-12 22:14:12,700 INFO L226 Difference]: Without dead ends: 6432 [2021-06-12 22:14:12,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:14:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-06-12 22:14:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 3056. [2021-06-12 22:14:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.528314238952537) internal successors, (10779), 3055 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10779 transitions. [2021-06-12 22:14:12,761 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10779 transitions. Word has length 28 [2021-06-12 22:14:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:12,761 INFO L482 AbstractCegarLoop]: Abstraction has 3056 states and 10779 transitions. [2021-06-12 22:14:12,761 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) [2021-06-12 22:14:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10779 transitions. [2021-06-12 22:14:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:12,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:12,765 INFO L472 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] [2021-06-12 22:14:12,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3912 [2021-06-12 22:14:12,981 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-12 22:14:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:12,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507426141] [2021-06-12 22:14:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507426141] [2021-06-12 22:14:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507426141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261974197] [2021-06-12 22:14:13,014 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 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 [2021-06-12 22:14:13,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261974197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:13,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:13,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494602632] [2021-06-12 22:14:13,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:13,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:13,109 INFO L87 Difference]: Start difference. First operand 3056 states and 10779 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) [2021-06-12 22:14:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:13,878 INFO L93 Difference]: Finished difference Result 6687 states and 21252 transitions. [2021-06-12 22:14:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:14:13,878 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 [2021-06-12 22:14:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:13,888 INFO L225 Difference]: With dead ends: 6687 [2021-06-12 22:14:13,888 INFO L226 Difference]: Without dead ends: 6687 [2021-06-12 22:14:13,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:14:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-06-12 22:14:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 3150. [2021-06-12 22:14:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.520482692918387) internal successors, (11086), 3149 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11086 transitions. [2021-06-12 22:14:13,952 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11086 transitions. Word has length 28 [2021-06-12 22:14:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:13,952 INFO L482 AbstractCegarLoop]: Abstraction has 3150 states and 11086 transitions. [2021-06-12 22:14:13,952 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) [2021-06-12 22:14:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11086 transitions. [2021-06-12 22:14:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:13,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:13,956 INFO L472 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] [2021-06-12 22:14:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3913 [2021-06-12 22:14:14,156 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-12 22:14:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045820428] [2021-06-12 22:14:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:14,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:14,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045820428] [2021-06-12 22:14:14,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045820428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:14,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186954736] [2021-06-12 22:14:14,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:14:14,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:14,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186954736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:14,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:14,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:14,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369985860] [2021-06-12 22:14:14,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:14,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:14,274 INFO L87 Difference]: Start difference. First operand 3150 states and 11086 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) [2021-06-12 22:14:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:14,862 INFO L93 Difference]: Finished difference Result 6847 states and 21782 transitions. [2021-06-12 22:14:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:14:14,863 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 [2021-06-12 22:14:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:14,872 INFO L225 Difference]: With dead ends: 6847 [2021-06-12 22:14:14,873 INFO L226 Difference]: Without dead ends: 6811 [2021-06-12 22:14:14,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:14:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2021-06-12 22:14:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 3552. [2021-06-12 22:14:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.5457617572514786) internal successors, (12591), 3551 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 12591 transitions. [2021-06-12 22:14:14,956 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 12591 transitions. Word has length 28 [2021-06-12 22:14:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:14,956 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 12591 transitions. [2021-06-12 22:14:14,956 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) [2021-06-12 22:14:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 12591 transitions. [2021-06-12 22:14:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:14,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:14,961 INFO L472 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] [2021-06-12 22:14:15,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:15,161 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:15,162 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-12 22:14:15,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:15,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985334640] [2021-06-12 22:14:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:15,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985334640] [2021-06-12 22:14:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985334640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202384443] [2021-06-12 22:14:15,192 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 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 [2021-06-12 22:14:15,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:14:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202384443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:15,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:15,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484843583] [2021-06-12 22:14:15,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:15,284 INFO L87 Difference]: Start difference. First operand 3552 states and 12591 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) [2021-06-12 22:14:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:15,841 INFO L93 Difference]: Finished difference Result 7020 states and 22256 transitions. [2021-06-12 22:14:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:14:15,842 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 [2021-06-12 22:14:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:15,851 INFO L225 Difference]: With dead ends: 7020 [2021-06-12 22:14:15,851 INFO L226 Difference]: Without dead ends: 7020 [2021-06-12 22:14:15,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:14:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2021-06-12 22:14:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 3265. [2021-06-12 22:14:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.5082720588235294) internal successors, (11451), 3264 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11451 transitions. [2021-06-12 22:14:15,919 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11451 transitions. Word has length 28 [2021-06-12 22:14:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:15,919 INFO L482 AbstractCegarLoop]: Abstraction has 3265 states and 11451 transitions. [2021-06-12 22:14:15,919 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) [2021-06-12 22:14:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11451 transitions. [2021-06-12 22:14:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:15,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:15,923 INFO L472 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] [2021-06-12 22:14:16,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-06-12 22:14:16,123 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-12 22:14:16,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:16,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429342497] [2021-06-12 22:14:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:16,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:16,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429342497] [2021-06-12 22:14:16,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429342497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:16,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209474322] [2021-06-12 22:14:16,157 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 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 [2021-06-12 22:14:16,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:14:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:16,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209474322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:16,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:16,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823311396] [2021-06-12 22:14:16,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:16,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:16,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:16,257 INFO L87 Difference]: Start difference. First operand 3265 states and 11451 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) [2021-06-12 22:14:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:16,903 INFO L93 Difference]: Finished difference Result 6180 states and 19991 transitions. [2021-06-12 22:14:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:14:16,903 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 [2021-06-12 22:14:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:16,914 INFO L225 Difference]: With dead ends: 6180 [2021-06-12 22:14:16,914 INFO L226 Difference]: Without dead ends: 6176 [2021-06-12 22:14:16,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:14:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-12 22:14:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 3025. [2021-06-12 22:14:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.5327380952380953) internal successors, (10683), 3024 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 10683 transitions. [2021-06-12 22:14:16,980 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 10683 transitions. Word has length 28 [2021-06-12 22:14:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:16,980 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 10683 transitions. [2021-06-12 22:14:16,980 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) [2021-06-12 22:14:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 10683 transitions. [2021-06-12 22:14:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:16,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:16,985 INFO L472 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] [2021-06-12 22:14:17,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-06-12 22:14:17,185 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-12 22:14:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:17,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134188294] [2021-06-12 22:14:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:17,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134188294] [2021-06-12 22:14:17,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134188294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464865767] [2021-06-12 22:14:17,221 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 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 [2021-06-12 22:14:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464865767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:17,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:17,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529348912] [2021-06-12 22:14:17,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:17,332 INFO L87 Difference]: Start difference. First operand 3025 states and 10683 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) [2021-06-12 22:14:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:18,273 INFO L93 Difference]: Finished difference Result 9433 states and 30825 transitions. [2021-06-12 22:14:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:14:18,273 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 [2021-06-12 22:14:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:18,287 INFO L225 Difference]: With dead ends: 9433 [2021-06-12 22:14:18,288 INFO L226 Difference]: Without dead ends: 9433 [2021-06-12 22:14:18,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:14:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-12 22:14:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 3201. [2021-06-12 22:14:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.6003125) internal successors, (11521), 3200 states have internal predecessors, (11521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11521 transitions. [2021-06-12 22:14:18,380 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11521 transitions. Word has length 28 [2021-06-12 22:14:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11521 transitions. [2021-06-12 22:14:18,380 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) [2021-06-12 22:14:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11521 transitions. [2021-06-12 22:14:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:18,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:18,385 INFO L472 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] [2021-06-12 22:14:18,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-06-12 22:14:18,585 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-12 22:14:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:18,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051933010] [2021-06-12 22:14:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:18,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051933010] [2021-06-12 22:14:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051933010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655252584] [2021-06-12 22:14:18,618 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 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 [2021-06-12 22:14:18,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:18,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655252584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:18,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:18,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509090403] [2021-06-12 22:14:18,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:18,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:18,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:18,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:18,740 INFO L87 Difference]: Start difference. First operand 3201 states and 11521 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) [2021-06-12 22:14:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:19,747 INFO L93 Difference]: Finished difference Result 9262 states and 30360 transitions. [2021-06-12 22:14:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:14:19,748 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 [2021-06-12 22:14:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:19,762 INFO L225 Difference]: With dead ends: 9262 [2021-06-12 22:14:19,762 INFO L226 Difference]: Without dead ends: 9262 [2021-06-12 22:14:19,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:14:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-12 22:14:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 3173. [2021-06-12 22:14:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.5851197982345524) internal successors, (11372), 3172 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 11372 transitions. [2021-06-12 22:14:19,846 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 11372 transitions. Word has length 28 [2021-06-12 22:14:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:19,846 INFO L482 AbstractCegarLoop]: Abstraction has 3173 states and 11372 transitions. [2021-06-12 22:14:19,846 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) [2021-06-12 22:14:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 11372 transitions. [2021-06-12 22:14:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:19,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:19,851 INFO L472 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] [2021-06-12 22:14:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-06-12 22:14:20,051 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-12 22:14:20,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:20,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139172856] [2021-06-12 22:14:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:20,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139172856] [2021-06-12 22:14:20,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139172856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122763470] [2021-06-12 22:14:20,084 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 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 [2021-06-12 22:14:20,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122763470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:20,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:14:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899401824] [2021-06-12 22:14:20,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:20,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:20,215 INFO L87 Difference]: Start difference. First operand 3173 states and 11372 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) [2021-06-12 22:14:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:21,110 INFO L93 Difference]: Finished difference Result 8699 states and 27601 transitions. [2021-06-12 22:14:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:14:21,110 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 [2021-06-12 22:14:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:21,123 INFO L225 Difference]: With dead ends: 8699 [2021-06-12 22:14:21,124 INFO L226 Difference]: Without dead ends: 8699 [2021-06-12 22:14:21,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:14:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-06-12 22:14:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 3193. [2021-06-12 22:14:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 3192 states have (on average 3.588345864661654) internal successors, (11454), 3192 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 11454 transitions. [2021-06-12 22:14:21,205 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 11454 transitions. Word has length 28 [2021-06-12 22:14:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:21,205 INFO L482 AbstractCegarLoop]: Abstraction has 3193 states and 11454 transitions. [2021-06-12 22:14:21,205 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) [2021-06-12 22:14:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 11454 transitions. [2021-06-12 22:14:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:21,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:21,209 INFO L472 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] [2021-06-12 22:14:21,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-12 22:14:21,409 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:21,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-12 22:14:21,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:21,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406740784] [2021-06-12 22:14:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:21,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:21,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406740784] [2021-06-12 22:14:21,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406740784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:21,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028468746] [2021-06-12 22:14:21,443 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 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 [2021-06-12 22:14:21,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:21,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:21,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:21,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028468746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:21,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:21,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:14:21,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129208028] [2021-06-12 22:14:21,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:21,538 INFO L87 Difference]: Start difference. First operand 3193 states and 11454 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) [2021-06-12 22:14:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:22,428 INFO L93 Difference]: Finished difference Result 8208 states and 26413 transitions. [2021-06-12 22:14:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:14:22,428 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 [2021-06-12 22:14:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:22,441 INFO L225 Difference]: With dead ends: 8208 [2021-06-12 22:14:22,441 INFO L226 Difference]: Without dead ends: 8200 [2021-06-12 22:14:22,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:14:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-06-12 22:14:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 3175. [2021-06-12 22:14:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.584436042848141) internal successors, (11377), 3174 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11377 transitions. [2021-06-12 22:14:22,519 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11377 transitions. Word has length 28 [2021-06-12 22:14:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:22,519 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11377 transitions. [2021-06-12 22:14:22,519 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) [2021-06-12 22:14:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11377 transitions. [2021-06-12 22:14:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:22,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:22,523 INFO L472 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] [2021-06-12 22:14:22,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:22,724 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-12 22:14:22,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:22,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026273055] [2021-06-12 22:14:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:22,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026273055] [2021-06-12 22:14:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026273055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917271606] [2021-06-12 22:14:22,756 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 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 [2021-06-12 22:14:22,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:14:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917271606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:22,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:22,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934789055] [2021-06-12 22:14:22,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:22,867 INFO L87 Difference]: Start difference. First operand 3175 states and 11377 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) [2021-06-12 22:14:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:23,748 INFO L93 Difference]: Finished difference Result 8126 states and 26160 transitions. [2021-06-12 22:14:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:14:23,748 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 [2021-06-12 22:14:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:23,760 INFO L225 Difference]: With dead ends: 8126 [2021-06-12 22:14:23,760 INFO L226 Difference]: Without dead ends: 8126 [2021-06-12 22:14:23,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:14:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-12 22:14:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 3191. [2021-06-12 22:14:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 3.5865203761755486) internal successors, (11441), 3190 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 11441 transitions. [2021-06-12 22:14:23,835 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 11441 transitions. Word has length 28 [2021-06-12 22:14:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:23,835 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 11441 transitions. [2021-06-12 22:14:23,836 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) [2021-06-12 22:14:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 11441 transitions. [2021-06-12 22:14:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:23,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:23,840 INFO L472 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] [2021-06-12 22:14:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3921 [2021-06-12 22:14:24,040 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-12 22:14:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:24,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909453294] [2021-06-12 22:14:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:24,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:24,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909453294] [2021-06-12 22:14:24,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909453294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:24,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091039568] [2021-06-12 22:14:24,072 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 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 [2021-06-12 22:14:24,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:14:24,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:24,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091039568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:24,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:24,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:24,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807875296] [2021-06-12 22:14:24,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:24,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:24,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:24,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:24,177 INFO L87 Difference]: Start difference. First operand 3191 states and 11441 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) [2021-06-12 22:14:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:25,105 INFO L93 Difference]: Finished difference Result 7794 states and 25376 transitions. [2021-06-12 22:14:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:14:25,105 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 [2021-06-12 22:14:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:25,117 INFO L225 Difference]: With dead ends: 7794 [2021-06-12 22:14:25,117 INFO L226 Difference]: Without dead ends: 7786 [2021-06-12 22:14:25,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:14:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-06-12 22:14:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 2948. [2021-06-12 22:14:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.508313539192399) internal successors, (10339), 2947 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 10339 transitions. [2021-06-12 22:14:25,192 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 10339 transitions. Word has length 28 [2021-06-12 22:14:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:25,192 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 10339 transitions. [2021-06-12 22:14:25,192 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) [2021-06-12 22:14:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 10339 transitions. [2021-06-12 22:14:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:25,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:25,195 INFO L472 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] [2021-06-12 22:14:25,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3922,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:25,396 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-12 22:14:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:25,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428639415] [2021-06-12 22:14:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:25,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428639415] [2021-06-12 22:14:25,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428639415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220811466] [2021-06-12 22:14:25,429 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 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 [2021-06-12 22:14:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220811466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:25,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:25,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:14:25,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966901480] [2021-06-12 22:14:25,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:25,539 INFO L87 Difference]: Start difference. First operand 2948 states and 10339 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) [2021-06-12 22:14:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:26,337 INFO L93 Difference]: Finished difference Result 6003 states and 19292 transitions. [2021-06-12 22:14:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:14:26,337 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 [2021-06-12 22:14:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:26,346 INFO L225 Difference]: With dead ends: 6003 [2021-06-12 22:14:26,346 INFO L226 Difference]: Without dead ends: 6003 [2021-06-12 22:14:26,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:14:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-06-12 22:14:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 2960. [2021-06-12 22:14:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.5069280162216967) internal successors, (10377), 2959 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10377 transitions. [2021-06-12 22:14:26,404 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10377 transitions. Word has length 28 [2021-06-12 22:14:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 2960 states and 10377 transitions. [2021-06-12 22:14:26,404 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) [2021-06-12 22:14:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10377 transitions. [2021-06-12 22:14:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:26,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:26,407 INFO L472 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] [2021-06-12 22:14:26,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3923 [2021-06-12 22:14:26,609 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:26,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-12 22:14:26,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:26,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915360152] [2021-06-12 22:14:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:26,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:26,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915360152] [2021-06-12 22:14:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915360152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:26,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839112370] [2021-06-12 22:14:26,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:14:26,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:26,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839112370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:26,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:26,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:14:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418266989] [2021-06-12 22:14:26,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:26,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:26,767 INFO L87 Difference]: Start difference. First operand 2960 states and 10377 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) [2021-06-12 22:14:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:27,885 INFO L93 Difference]: Finished difference Result 6789 states and 21302 transitions. [2021-06-12 22:14:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:14:27,885 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 [2021-06-12 22:14:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:27,895 INFO L225 Difference]: With dead ends: 6789 [2021-06-12 22:14:27,896 INFO L226 Difference]: Without dead ends: 6789 [2021-06-12 22:14:27,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:14:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6789 states. [2021-06-12 22:14:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6789 to 3026. [2021-06-12 22:14:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5021487603305785) internal successors, (10594), 3025 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10594 transitions. [2021-06-12 22:14:27,964 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10594 transitions. Word has length 28 [2021-06-12 22:14:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:27,964 INFO L482 AbstractCegarLoop]: Abstraction has 3026 states and 10594 transitions. [2021-06-12 22:14:27,964 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) [2021-06-12 22:14:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10594 transitions. [2021-06-12 22:14:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:27,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:27,968 INFO L472 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] [2021-06-12 22:14:28,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:28,169 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:28,169 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-12 22:14:28,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:28,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383250724] [2021-06-12 22:14:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:28,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383250724] [2021-06-12 22:14:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383250724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397376752] [2021-06-12 22:14:28,202 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 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 [2021-06-12 22:14:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:14:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397376752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:14:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728872959] [2021-06-12 22:14:28,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:28,326 INFO L87 Difference]: Start difference. First operand 3026 states and 10594 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) [2021-06-12 22:14:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:29,311 INFO L93 Difference]: Finished difference Result 6345 states and 20138 transitions. [2021-06-12 22:14:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:14:29,311 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 [2021-06-12 22:14:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:29,320 INFO L225 Difference]: With dead ends: 6345 [2021-06-12 22:14:29,320 INFO L226 Difference]: Without dead ends: 6341 [2021-06-12 22:14:29,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:14:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2021-06-12 22:14:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 2952. [2021-06-12 22:14:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.4984750931887496) internal successors, (10324), 2951 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10324 transitions. [2021-06-12 22:14:29,379 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10324 transitions. Word has length 28 [2021-06-12 22:14:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:29,379 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10324 transitions. [2021-06-12 22:14:29,379 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) [2021-06-12 22:14:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10324 transitions. [2021-06-12 22:14:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:29,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:29,382 INFO L472 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] [2021-06-12 22:14:29,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-06-12 22:14:29,583 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 67 times [2021-06-12 22:14:29,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:29,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579729320] [2021-06-12 22:14:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579729320] [2021-06-12 22:14:29,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579729320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672480218] [2021-06-12 22:14:29,632 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 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 [2021-06-12 22:14:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672480218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:29,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:29,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:14:29,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34105211] [2021-06-12 22:14:29,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:29,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:29,728 INFO L87 Difference]: Start difference. First operand 2952 states and 10324 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) [2021-06-12 22:14:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:30,297 INFO L93 Difference]: Finished difference Result 5472 states and 17679 transitions. [2021-06-12 22:14:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:14:30,297 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 [2021-06-12 22:14:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:30,305 INFO L225 Difference]: With dead ends: 5472 [2021-06-12 22:14:30,305 INFO L226 Difference]: Without dead ends: 5472 [2021-06-12 22:14:30,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:14:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-12 22:14:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 2952. [2021-06-12 22:14:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.5005083022704166) internal successors, (10330), 2951 states have internal predecessors, (10330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10330 transitions. [2021-06-12 22:14:30,353 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10330 transitions. Word has length 28 [2021-06-12 22:14:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:30,353 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10330 transitions. [2021-06-12 22:14:30,353 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) [2021-06-12 22:14:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10330 transitions. [2021-06-12 22:14:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:30,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:30,356 INFO L472 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] [2021-06-12 22:14:30,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-12 22:14:30,557 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 68 times [2021-06-12 22:14:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:30,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244876462] [2021-06-12 22:14:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:30,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244876462] [2021-06-12 22:14:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244876462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771499754] [2021-06-12 22:14:30,595 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 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 [2021-06-12 22:14:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:30,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771499754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:30,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:30,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:14:30,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442983610] [2021-06-12 22:14:30,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:30,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:30,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:30,691 INFO L87 Difference]: Start difference. First operand 2952 states and 10330 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) [2021-06-12 22:14:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:31,407 INFO L93 Difference]: Finished difference Result 5809 states and 18633 transitions. [2021-06-12 22:14:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:14:31,407 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 [2021-06-12 22:14:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:31,416 INFO L225 Difference]: With dead ends: 5809 [2021-06-12 22:14:31,416 INFO L226 Difference]: Without dead ends: 5809 [2021-06-12 22:14:31,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:14:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2021-06-12 22:14:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 2943. [2021-06-12 22:14:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 3.500679809653297) internal successors, (10299), 2942 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 10299 transitions. [2021-06-12 22:14:31,496 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 10299 transitions. Word has length 28 [2021-06-12 22:14:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:31,496 INFO L482 AbstractCegarLoop]: Abstraction has 2943 states and 10299 transitions. [2021-06-12 22:14:31,496 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) [2021-06-12 22:14:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 10299 transitions. [2021-06-12 22:14:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:31,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:31,499 INFO L472 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] [2021-06-12 22:14:31,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-06-12 22:14:31,713 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 69 times [2021-06-12 22:14:31,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:31,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032711438] [2021-06-12 22:14:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032711438] [2021-06-12 22:14:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032711438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567606497] [2021-06-12 22:14:31,751 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 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 [2021-06-12 22:14:31,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:31,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:31,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567606497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:31,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:31,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:14:31,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751239452] [2021-06-12 22:14:31,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:31,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:31,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:31,844 INFO L87 Difference]: Start difference. First operand 2943 states and 10299 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) [2021-06-12 22:14:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:32,659 INFO L93 Difference]: Finished difference Result 6283 states and 19914 transitions. [2021-06-12 22:14:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:14:32,660 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 [2021-06-12 22:14:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:32,669 INFO L225 Difference]: With dead ends: 6283 [2021-06-12 22:14:32,669 INFO L226 Difference]: Without dead ends: 6283 [2021-06-12 22:14:32,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:14:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2021-06-12 22:14:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 3003. [2021-06-12 22:14:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.4966688874083944) internal successors, (10497), 3002 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10497 transitions. [2021-06-12 22:14:32,731 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10497 transitions. Word has length 28 [2021-06-12 22:14:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:32,731 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10497 transitions. [2021-06-12 22:14:32,731 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) [2021-06-12 22:14:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10497 transitions. [2021-06-12 22:14:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:32,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:32,735 INFO L472 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] [2021-06-12 22:14:32,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-06-12 22:14:32,936 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:32,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 70 times [2021-06-12 22:14:32,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:32,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022841201] [2021-06-12 22:14:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:32,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022841201] [2021-06-12 22:14:32,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022841201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82701524] [2021-06-12 22:14:32,968 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 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 [2021-06-12 22:14:32,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:32,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82701524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:14:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090102281] [2021-06-12 22:14:33,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:33,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:33,093 INFO L87 Difference]: Start difference. First operand 3003 states and 10497 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) [2021-06-12 22:14:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:33,627 INFO L93 Difference]: Finished difference Result 7087 states and 23881 transitions. [2021-06-12 22:14:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:14:33,627 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 [2021-06-12 22:14:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:33,638 INFO L225 Difference]: With dead ends: 7087 [2021-06-12 22:14:33,638 INFO L226 Difference]: Without dead ends: 7087 [2021-06-12 22:14:33,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:14:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-06-12 22:14:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 4173. [2021-06-12 22:14:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.6116970278044103) internal successors, (15068), 4172 states have internal predecessors, (15068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 15068 transitions. [2021-06-12 22:14:33,719 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 15068 transitions. Word has length 28 [2021-06-12 22:14:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:33,720 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 15068 transitions. [2021-06-12 22:14:33,720 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) [2021-06-12 22:14:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 15068 transitions. [2021-06-12 22:14:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:33,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:33,726 INFO L472 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] [2021-06-12 22:14:33,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3929 [2021-06-12 22:14:33,926 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 71 times [2021-06-12 22:14:33,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:33,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924297662] [2021-06-12 22:14:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924297662] [2021-06-12 22:14:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924297662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985158509] [2021-06-12 22:14:33,966 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 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 [2021-06-12 22:14:33,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:14:33,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:34,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985158509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:34,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:34,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:14:34,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583966829] [2021-06-12 22:14:34,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:34,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:34,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:34,053 INFO L87 Difference]: Start difference. First operand 4173 states and 15068 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) [2021-06-12 22:14:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:34,846 INFO L93 Difference]: Finished difference Result 7520 states and 25447 transitions. [2021-06-12 22:14:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:14:34,847 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 [2021-06-12 22:14:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:34,859 INFO L225 Difference]: With dead ends: 7520 [2021-06-12 22:14:34,859 INFO L226 Difference]: Without dead ends: 7516 [2021-06-12 22:14:34,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:14:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-06-12 22:14:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 4065. [2021-06-12 22:14:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.6205708661417324) internal successors, (14714), 4064 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14714 transitions. [2021-06-12 22:14:34,948 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14714 transitions. Word has length 28 [2021-06-12 22:14:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:34,948 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14714 transitions. [2021-06-12 22:14:34,948 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) [2021-06-12 22:14:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14714 transitions. [2021-06-12 22:14:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:34,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:34,954 INFO L472 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] [2021-06-12 22:14:35,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3930,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:35,154 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-12 22:14:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:35,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217359134] [2021-06-12 22:14:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:35,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:35,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217359134] [2021-06-12 22:14:35,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217359134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:35,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116287751] [2021-06-12 22:14:35,181 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 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 [2021-06-12 22:14:35,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116287751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:35,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:35,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:14:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905665641] [2021-06-12 22:14:35,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:35,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:35,282 INFO L87 Difference]: Start difference. First operand 4065 states and 14714 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) [2021-06-12 22:14:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:36,093 INFO L93 Difference]: Finished difference Result 8329 states and 27951 transitions. [2021-06-12 22:14:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:14:36,094 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 [2021-06-12 22:14:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:36,106 INFO L225 Difference]: With dead ends: 8329 [2021-06-12 22:14:36,106 INFO L226 Difference]: Without dead ends: 8320 [2021-06-12 22:14:36,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:14:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8320 states. [2021-06-12 22:14:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 4505. [2021-06-12 22:14:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 3.70892539964476) internal successors, (16705), 4504 states have internal predecessors, (16705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 16705 transitions. [2021-06-12 22:14:36,193 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 16705 transitions. Word has length 28 [2021-06-12 22:14:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:36,193 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 16705 transitions. [2021-06-12 22:14:36,193 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) [2021-06-12 22:14:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 16705 transitions. [2021-06-12 22:14:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:36,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:36,199 INFO L472 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] [2021-06-12 22:14:36,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:36,400 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-12 22:14:36,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:36,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232371702] [2021-06-12 22:14:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:36,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:36,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232371702] [2021-06-12 22:14:36,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232371702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:36,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694660572] [2021-06-12 22:14:36,428 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 [2021-06-12 22:14:36,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:14:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:36,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694660572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:36,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:36,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:14:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276068336] [2021-06-12 22:14:36,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:36,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:36,529 INFO L87 Difference]: Start difference. First operand 4505 states and 16705 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) [2021-06-12 22:14:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:37,341 INFO L93 Difference]: Finished difference Result 8622 states and 28858 transitions. [2021-06-12 22:14:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:14:37,341 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 [2021-06-12 22:14:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:37,355 INFO L225 Difference]: With dead ends: 8622 [2021-06-12 22:14:37,355 INFO L226 Difference]: Without dead ends: 8622 [2021-06-12 22:14:37,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:14:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2021-06-12 22:14:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 4525. [2021-06-12 22:14:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 3.6965075154730327) internal successors, (16723), 4524 states have internal predecessors, (16723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 16723 transitions. [2021-06-12 22:14:37,452 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 16723 transitions. Word has length 28 [2021-06-12 22:14:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:37,452 INFO L482 AbstractCegarLoop]: Abstraction has 4525 states and 16723 transitions. [2021-06-12 22:14:37,452 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) [2021-06-12 22:14:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 16723 transitions. [2021-06-12 22:14:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:37,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:37,459 INFO L472 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] [2021-06-12 22:14:37,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:37,674 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-12 22:14:37,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:37,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686011587] [2021-06-12 22:14:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:37,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686011587] [2021-06-12 22:14:37,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686011587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989960560] [2021-06-12 22:14:37,709 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 [2021-06-12 22:14:37,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:14:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:37,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:37,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989960560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:37,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:37,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:14:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428882796] [2021-06-12 22:14:37,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:37,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:37,799 INFO L87 Difference]: Start difference. First operand 4525 states and 16723 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) [2021-06-12 22:14:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:38,192 INFO L93 Difference]: Finished difference Result 8054 states and 28373 transitions. [2021-06-12 22:14:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:14:38,193 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 [2021-06-12 22:14:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:38,230 INFO L225 Difference]: With dead ends: 8054 [2021-06-12 22:14:38,230 INFO L226 Difference]: Without dead ends: 7950 [2021-06-12 22:14:38,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:14:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-06-12 22:14:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 5973. [2021-06-12 22:14:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5972 states have (on average 3.7582049564634965) internal successors, (22444), 5972 states have internal predecessors, (22444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 22444 transitions. [2021-06-12 22:14:38,324 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 22444 transitions. Word has length 28 [2021-06-12 22:14:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:38,324 INFO L482 AbstractCegarLoop]: Abstraction has 5973 states and 22444 transitions. [2021-06-12 22:14:38,324 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) [2021-06-12 22:14:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 22444 transitions. [2021-06-12 22:14:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:38,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:38,332 INFO L472 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] [2021-06-12 22:14:38,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-12 22:14:38,532 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-12 22:14:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:38,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874335258] [2021-06-12 22:14:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:38,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874335258] [2021-06-12 22:14:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874335258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385381057] [2021-06-12 22:14:38,558 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 [2021-06-12 22:14:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:14:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:38,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385381057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:38,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:38,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:14:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057699496] [2021-06-12 22:14:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:14:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:14:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:14:38,630 INFO L87 Difference]: Start difference. First operand 5973 states and 22444 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) [2021-06-12 22:14:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:38,813 INFO L93 Difference]: Finished difference Result 8289 states and 29168 transitions. [2021-06-12 22:14:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:14:38,814 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 [2021-06-12 22:14:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:38,828 INFO L225 Difference]: With dead ends: 8289 [2021-06-12 22:14:38,828 INFO L226 Difference]: Without dead ends: 8289 [2021-06-12 22:14:38,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-12 22:14:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 6119. [2021-06-12 22:14:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 3.7355344883949004) internal successors, (22854), 6118 states have internal predecessors, (22854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 22854 transitions. [2021-06-12 22:14:38,933 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 22854 transitions. Word has length 28 [2021-06-12 22:14:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:38,933 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 22854 transitions. [2021-06-12 22:14:38,933 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) [2021-06-12 22:14:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 22854 transitions. [2021-06-12 22:14:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:38,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:38,941 INFO L472 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] [2021-06-12 22:14:39,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3934,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:39,142 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-12 22:14:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393517947] [2021-06-12 22:14:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:39,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393517947] [2021-06-12 22:14:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393517947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947432285] [2021-06-12 22:14:39,181 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 [2021-06-12 22:14:39,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:39,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947432285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:39,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:39,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:14:39,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219034945] [2021-06-12 22:14:39,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:39,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:39,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:39,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:39,297 INFO L87 Difference]: Start difference. First operand 6119 states and 22854 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) [2021-06-12 22:14:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:39,992 INFO L93 Difference]: Finished difference Result 12663 states and 44044 transitions. [2021-06-12 22:14:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:14:39,992 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 [2021-06-12 22:14:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:40,016 INFO L225 Difference]: With dead ends: 12663 [2021-06-12 22:14:40,016 INFO L226 Difference]: Without dead ends: 12663 [2021-06-12 22:14:40,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:14:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-06-12 22:14:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 6788. [2021-06-12 22:14:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6788 states, 6787 states have (on average 3.7501105053779282) internal successors, (25452), 6787 states have internal predecessors, (25452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6788 states to 6788 states and 25452 transitions. [2021-06-12 22:14:40,214 INFO L78 Accepts]: Start accepts. Automaton has 6788 states and 25452 transitions. Word has length 28 [2021-06-12 22:14:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 6788 states and 25452 transitions. [2021-06-12 22:14:40,214 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) [2021-06-12 22:14:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6788 states and 25452 transitions. [2021-06-12 22:14:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:40,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:40,224 INFO L472 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] [2021-06-12 22:14:40,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-12 22:14:40,425 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-12 22:14:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161256391] [2021-06-12 22:14:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:40,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:40,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161256391] [2021-06-12 22:14:40,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161256391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:40,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353325414] [2021-06-12 22:14:40,457 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 [2021-06-12 22:14:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:40,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353325414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:40,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:40,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:14:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441617784] [2021-06-12 22:14:40,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:40,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:40,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:40,538 INFO L87 Difference]: Start difference. First operand 6788 states and 25452 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) [2021-06-12 22:14:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:41,155 INFO L93 Difference]: Finished difference Result 12824 states and 44637 transitions. [2021-06-12 22:14:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:14:41,155 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 [2021-06-12 22:14:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:41,179 INFO L225 Difference]: With dead ends: 12824 [2021-06-12 22:14:41,179 INFO L226 Difference]: Without dead ends: 12824 [2021-06-12 22:14:41,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:14:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-12 22:14:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7036. [2021-06-12 22:14:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.729637526652452) internal successors, (26238), 7035 states have internal predecessors, (26238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 26238 transitions. [2021-06-12 22:14:41,378 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 26238 transitions. Word has length 28 [2021-06-12 22:14:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:41,378 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 26238 transitions. [2021-06-12 22:14:41,378 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) [2021-06-12 22:14:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 26238 transitions. [2021-06-12 22:14:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:41,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:41,390 INFO L472 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] [2021-06-12 22:14:41,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:41,590 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:41,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 82 times [2021-06-12 22:14:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:41,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227674374] [2021-06-12 22:14:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:41,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:41,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227674374] [2021-06-12 22:14:41,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227674374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:41,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093588326] [2021-06-12 22:14:41,619 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 [2021-06-12 22:14:41,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093588326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:41,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:41,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:14:41,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620992747] [2021-06-12 22:14:41,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:14:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:14:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:14:41,705 INFO L87 Difference]: Start difference. First operand 7036 states and 26238 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) [2021-06-12 22:14:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:42,078 INFO L93 Difference]: Finished difference Result 10405 states and 36941 transitions. [2021-06-12 22:14:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:14:42,079 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 [2021-06-12 22:14:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:42,096 INFO L225 Difference]: With dead ends: 10405 [2021-06-12 22:14:42,096 INFO L226 Difference]: Without dead ends: 10405 [2021-06-12 22:14:42,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:14:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2021-06-12 22:14:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 7946. [2021-06-12 22:14:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7946 states, 7945 states have (on average 3.7539332913782255) internal successors, (29825), 7945 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 29825 transitions. [2021-06-12 22:14:42,242 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 29825 transitions. Word has length 28 [2021-06-12 22:14:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:42,242 INFO L482 AbstractCegarLoop]: Abstraction has 7946 states and 29825 transitions. [2021-06-12 22:14:42,242 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) [2021-06-12 22:14:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 29825 transitions. [2021-06-12 22:14:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:42,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:42,255 INFO L472 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] [2021-06-12 22:14:42,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:42,455 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:42,456 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 83 times [2021-06-12 22:14:42,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:42,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610473820] [2021-06-12 22:14:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610473820] [2021-06-12 22:14:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610473820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010954882] [2021-06-12 22:14:42,488 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 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 [2021-06-12 22:14:42,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:14:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010954882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:42,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:42,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:14:42,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877465453] [2021-06-12 22:14:42,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:42,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:42,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:42,565 INFO L87 Difference]: Start difference. First operand 7946 states and 29825 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) [2021-06-12 22:14:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:43,166 INFO L93 Difference]: Finished difference Result 13522 states and 48006 transitions. [2021-06-12 22:14:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:14:43,166 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 [2021-06-12 22:14:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:43,191 INFO L225 Difference]: With dead ends: 13522 [2021-06-12 22:14:43,191 INFO L226 Difference]: Without dead ends: 13518 [2021-06-12 22:14:43,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:14:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13518 states. [2021-06-12 22:14:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13518 to 7858. [2021-06-12 22:14:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.7557591956217387) internal successors, (29509), 7857 states have internal predecessors, (29509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 29509 transitions. [2021-06-12 22:14:43,370 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 29509 transitions. Word has length 28 [2021-06-12 22:14:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:43,370 INFO L482 AbstractCegarLoop]: Abstraction has 7858 states and 29509 transitions. [2021-06-12 22:14:43,370 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) [2021-06-12 22:14:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 29509 transitions. [2021-06-12 22:14:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:43,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:43,382 INFO L472 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] [2021-06-12 22:14:43,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3938 [2021-06-12 22:14:43,582 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -48820569, now seen corresponding path program 84 times [2021-06-12 22:14:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:43,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382344900] [2021-06-12 22:14:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:43,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:43,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382344900] [2021-06-12 22:14:43,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382344900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:43,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202144704] [2021-06-12 22:14:43,621 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 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 [2021-06-12 22:14:43,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202144704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:43,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:43,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:14:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871816956] [2021-06-12 22:14:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:43,703 INFO L87 Difference]: Start difference. First operand 7858 states and 29509 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) [2021-06-12 22:14:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:44,156 INFO L93 Difference]: Finished difference Result 10648 states and 37827 transitions. [2021-06-12 22:14:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:14:44,156 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 [2021-06-12 22:14:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:44,176 INFO L225 Difference]: With dead ends: 10648 [2021-06-12 22:14:44,176 INFO L226 Difference]: Without dead ends: 10648 [2021-06-12 22:14:44,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:14:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-06-12 22:14:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 7756. [2021-06-12 22:14:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.752675693101225) internal successors, (29102), 7755 states have internal predecessors, (29102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29102 transitions. [2021-06-12 22:14:44,326 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29102 transitions. Word has length 28 [2021-06-12 22:14:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:44,326 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29102 transitions. [2021-06-12 22:14:44,326 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) [2021-06-12 22:14:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29102 transitions. [2021-06-12 22:14:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:44,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:44,337 INFO L472 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] [2021-06-12 22:14:44,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3939,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:44,541 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 85 times [2021-06-12 22:14:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:44,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617909820] [2021-06-12 22:14:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:44,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617909820] [2021-06-12 22:14:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617909820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358222209] [2021-06-12 22:14:44,583 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 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 [2021-06-12 22:14:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:44,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358222209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:44,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:44,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:14:44,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065863556] [2021-06-12 22:14:44,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:44,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:44,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:44,658 INFO L87 Difference]: Start difference. First operand 7756 states and 29102 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) [2021-06-12 22:14:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:45,293 INFO L93 Difference]: Finished difference Result 13360 states and 47364 transitions. [2021-06-12 22:14:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:14:45,293 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 [2021-06-12 22:14:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:45,318 INFO L225 Difference]: With dead ends: 13360 [2021-06-12 22:14:45,318 INFO L226 Difference]: Without dead ends: 13348 [2021-06-12 22:14:45,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:14:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-06-12 22:14:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 7756. [2021-06-12 22:14:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.7513862024500324) internal successors, (29092), 7755 states have internal predecessors, (29092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29092 transitions. [2021-06-12 22:14:45,512 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29092 transitions. Word has length 28 [2021-06-12 22:14:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:45,512 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29092 transitions. [2021-06-12 22:14:45,512 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) [2021-06-12 22:14:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29092 transitions. [2021-06-12 22:14:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:45,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:45,523 INFO L472 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] [2021-06-12 22:14:45,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:45,724 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:45,724 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 86 times [2021-06-12 22:14:45,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:45,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837265196] [2021-06-12 22:14:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837265196] [2021-06-12 22:14:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837265196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675898293] [2021-06-12 22:14:45,762 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 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 [2021-06-12 22:14:45,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:45,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675898293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:45,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:45,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:14:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574795030] [2021-06-12 22:14:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:45,852 INFO L87 Difference]: Start difference. First operand 7756 states and 29092 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) [2021-06-12 22:14:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:46,982 INFO L93 Difference]: Finished difference Result 20318 states and 70854 transitions. [2021-06-12 22:14:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:14:46,983 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 [2021-06-12 22:14:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:47,025 INFO L225 Difference]: With dead ends: 20318 [2021-06-12 22:14:47,026 INFO L226 Difference]: Without dead ends: 20318 [2021-06-12 22:14:47,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 684.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:14:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20318 states. [2021-06-12 22:14:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20318 to 10596. [2021-06-12 22:14:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10596 states, 10595 states have (on average 3.79443133553563) internal successors, (40202), 10595 states have internal predecessors, (40202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 40202 transitions. [2021-06-12 22:14:47,333 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 40202 transitions. Word has length 28 [2021-06-12 22:14:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:47,333 INFO L482 AbstractCegarLoop]: Abstraction has 10596 states and 40202 transitions. [2021-06-12 22:14:47,333 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) [2021-06-12 22:14:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 40202 transitions. [2021-06-12 22:14:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:47,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:47,349 INFO L472 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] [2021-06-12 22:14:47,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:47,550 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 87 times [2021-06-12 22:14:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:47,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37471048] [2021-06-12 22:14:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:47,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37471048] [2021-06-12 22:14:47,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37471048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544573932] [2021-06-12 22:14:47,588 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 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 [2021-06-12 22:14:47,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:47,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544573932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:47,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:47,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:14:47,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685451983] [2021-06-12 22:14:47,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:47,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:47,671 INFO L87 Difference]: Start difference. First operand 10596 states and 40202 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) [2021-06-12 22:14:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:48,697 INFO L93 Difference]: Finished difference Result 19544 states and 68833 transitions. [2021-06-12 22:14:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:14:48,697 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 [2021-06-12 22:14:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:48,735 INFO L225 Difference]: With dead ends: 19544 [2021-06-12 22:14:48,736 INFO L226 Difference]: Without dead ends: 19532 [2021-06-12 22:14:48,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:14:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19532 states. [2021-06-12 22:14:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19532 to 10410. [2021-06-12 22:14:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10409 states have (on average 3.8004611393985974) internal successors, (39559), 10409 states have internal predecessors, (39559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 39559 transitions. [2021-06-12 22:14:49,024 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 39559 transitions. Word has length 28 [2021-06-12 22:14:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:49,024 INFO L482 AbstractCegarLoop]: Abstraction has 10410 states and 39559 transitions. [2021-06-12 22:14:49,024 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) [2021-06-12 22:14:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 39559 transitions. [2021-06-12 22:14:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:49,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:49,039 INFO L472 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] [2021-06-12 22:14:49,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3942 [2021-06-12 22:14:49,240 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 88 times [2021-06-12 22:14:49,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:49,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571981476] [2021-06-12 22:14:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:49,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571981476] [2021-06-12 22:14:49,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571981476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:49,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109738244] [2021-06-12 22:14:49,278 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 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 [2021-06-12 22:14:49,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:49,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109738244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:49,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:49,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:14:49,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494373388] [2021-06-12 22:14:49,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:49,378 INFO L87 Difference]: Start difference. First operand 10410 states and 39559 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) [2021-06-12 22:14:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:50,335 INFO L93 Difference]: Finished difference Result 19373 states and 68230 transitions. [2021-06-12 22:14:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:14:50,335 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 [2021-06-12 22:14:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:50,377 INFO L225 Difference]: With dead ends: 19373 [2021-06-12 22:14:50,377 INFO L226 Difference]: Without dead ends: 19337 [2021-06-12 22:14:50,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:14:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-06-12 22:14:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 10460. [2021-06-12 22:14:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10460 states, 10459 states have (on average 3.798451094750932) internal successors, (39728), 10459 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 39728 transitions. [2021-06-12 22:14:50,668 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 39728 transitions. Word has length 28 [2021-06-12 22:14:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:50,668 INFO L482 AbstractCegarLoop]: Abstraction has 10460 states and 39728 transitions. [2021-06-12 22:14:50,668 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) [2021-06-12 22:14:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 39728 transitions. [2021-06-12 22:14:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:50,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:50,683 INFO L472 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] [2021-06-12 22:14:50,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:50,884 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 89 times [2021-06-12 22:14:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:50,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867466954] [2021-06-12 22:14:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:50,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867466954] [2021-06-12 22:14:50,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867466954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797660384] [2021-06-12 22:14:50,923 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 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 [2021-06-12 22:14:50,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:14:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797660384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:51,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:51,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:14:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385252668] [2021-06-12 22:14:51,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:51,085 INFO L87 Difference]: Start difference. First operand 10460 states and 39728 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) [2021-06-12 22:14:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:52,513 INFO L93 Difference]: Finished difference Result 19259 states and 67953 transitions. [2021-06-12 22:14:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:14:52,513 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 [2021-06-12 22:14:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:52,550 INFO L225 Difference]: With dead ends: 19259 [2021-06-12 22:14:52,550 INFO L226 Difference]: Without dead ends: 19259 [2021-06-12 22:14:52,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 859.1ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:14:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19259 states. [2021-06-12 22:14:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19259 to 10656. [2021-06-12 22:14:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.7895823557015484) internal successors, (40378), 10655 states have internal predecessors, (40378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 40378 transitions. [2021-06-12 22:14:52,895 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 40378 transitions. Word has length 28 [2021-06-12 22:14:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:52,895 INFO L482 AbstractCegarLoop]: Abstraction has 10656 states and 40378 transitions. [2021-06-12 22:14:52,895 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) [2021-06-12 22:14:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 40378 transitions. [2021-06-12 22:14:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:52,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:52,912 INFO L472 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] [2021-06-12 22:14:53,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3944 [2021-06-12 22:14:53,112 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 90 times [2021-06-12 22:14:53,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:53,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267811831] [2021-06-12 22:14:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267811831] [2021-06-12 22:14:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267811831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823581439] [2021-06-12 22:14:53,154 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 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 [2021-06-12 22:14:53,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:14:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:53,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823581439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:53,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:53,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:14:53,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815170580] [2021-06-12 22:14:53,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:53,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:53,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:53,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:53,266 INFO L87 Difference]: Start difference. First operand 10656 states and 40378 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) [2021-06-12 22:14:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:54,420 INFO L93 Difference]: Finished difference Result 18895 states and 66950 transitions. [2021-06-12 22:14:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:14:54,421 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 [2021-06-12 22:14:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:54,456 INFO L225 Difference]: With dead ends: 18895 [2021-06-12 22:14:54,456 INFO L226 Difference]: Without dead ends: 18883 [2021-06-12 22:14:54,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:14:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2021-06-12 22:14:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 10538. [2021-06-12 22:14:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 3.793964126411692) internal successors, (39977), 10537 states have internal predecessors, (39977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 39977 transitions. [2021-06-12 22:14:54,773 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 39977 transitions. Word has length 28 [2021-06-12 22:14:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:54,773 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 39977 transitions. [2021-06-12 22:14:54,773 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) [2021-06-12 22:14:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 39977 transitions. [2021-06-12 22:14:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:54,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:54,789 INFO L472 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] [2021-06-12 22:14:54,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:54,989 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 91 times [2021-06-12 22:14:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928627581] [2021-06-12 22:14:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928627581] [2021-06-12 22:14:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928627581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865470242] [2021-06-12 22:14:55,028 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 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 [2021-06-12 22:14:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865470242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:55,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:55,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:14:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70874499] [2021-06-12 22:14:55,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:55,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:55,122 INFO L87 Difference]: Start difference. First operand 10538 states and 39977 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) [2021-06-12 22:14:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:56,071 INFO L93 Difference]: Finished difference Result 18135 states and 64866 transitions. [2021-06-12 22:14:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:14:56,072 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 [2021-06-12 22:14:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:56,106 INFO L225 Difference]: With dead ends: 18135 [2021-06-12 22:14:56,106 INFO L226 Difference]: Without dead ends: 18099 [2021-06-12 22:14:56,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:14:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-06-12 22:14:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 10562. [2021-06-12 22:14:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10562 states, 10561 states have (on average 3.7929173373733547) internal successors, (40057), 10561 states have internal predecessors, (40057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10562 states to 10562 states and 40057 transitions. [2021-06-12 22:14:56,385 INFO L78 Accepts]: Start accepts. Automaton has 10562 states and 40057 transitions. Word has length 28 [2021-06-12 22:14:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:56,385 INFO L482 AbstractCegarLoop]: Abstraction has 10562 states and 40057 transitions. [2021-06-12 22:14:56,385 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) [2021-06-12 22:14:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10562 states and 40057 transitions. [2021-06-12 22:14:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:56,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:56,401 INFO L472 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] [2021-06-12 22:14:56,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3946,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:56,602 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 92 times [2021-06-12 22:14:56,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:56,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900081839] [2021-06-12 22:14:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:56,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:56,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900081839] [2021-06-12 22:14:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900081839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:56,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965902345] [2021-06-12 22:14:56,642 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 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 [2021-06-12 22:14:56,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:56,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965902345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:56,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:56,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:14:56,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780293950] [2021-06-12 22:14:56,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:56,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:56,788 INFO L87 Difference]: Start difference. First operand 10562 states and 40057 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) [2021-06-12 22:14:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:58,012 INFO L93 Difference]: Finished difference Result 26263 states and 93462 transitions. [2021-06-12 22:14:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:14:58,012 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 [2021-06-12 22:14:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:58,078 INFO L225 Difference]: With dead ends: 26263 [2021-06-12 22:14:58,078 INFO L226 Difference]: Without dead ends: 26263 [2021-06-12 22:14:58,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:14:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26263 states. [2021-06-12 22:14:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26263 to 10852. [2021-06-12 22:14:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 10851 states have (on average 3.818173440235923) internal successors, (41431), 10851 states have internal predecessors, (41431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 41431 transitions. [2021-06-12 22:14:58,430 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 41431 transitions. Word has length 28 [2021-06-12 22:14:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:58,430 INFO L482 AbstractCegarLoop]: Abstraction has 10852 states and 41431 transitions. [2021-06-12 22:14:58,430 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) [2021-06-12 22:14:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 41431 transitions. [2021-06-12 22:14:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:58,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:58,446 INFO L472 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] [2021-06-12 22:14:58,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-12 22:14:58,646 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 93 times [2021-06-12 22:14:58,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:58,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454802770] [2021-06-12 22:14:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:58,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454802770] [2021-06-12 22:14:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454802770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707251980] [2021-06-12 22:14:58,679 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 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 [2021-06-12 22:14:58,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:58,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:58,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:58,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707251980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:58,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:58,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:14:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838300991] [2021-06-12 22:14:58,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:58,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:58,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:58,796 INFO L87 Difference]: Start difference. First operand 10852 states and 41431 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) [2021-06-12 22:15:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:00,071 INFO L93 Difference]: Finished difference Result 25703 states and 92092 transitions. [2021-06-12 22:15:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:15:00,072 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 [2021-06-12 22:15:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:00,130 INFO L225 Difference]: With dead ends: 25703 [2021-06-12 22:15:00,130 INFO L226 Difference]: Without dead ends: 25703 [2021-06-12 22:15:00,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:15:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25703 states. [2021-06-12 22:15:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25703 to 10754. [2021-06-12 22:15:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 3.8055426392634613) internal successors, (40921), 10753 states have internal predecessors, (40921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 40921 transitions. [2021-06-12 22:15:00,513 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 40921 transitions. Word has length 28 [2021-06-12 22:15:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:00,513 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 40921 transitions. [2021-06-12 22:15:00,513 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) [2021-06-12 22:15:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 40921 transitions. [2021-06-12 22:15:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:00,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:00,529 INFO L472 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] [2021-06-12 22:15:00,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3948 [2021-06-12 22:15:00,729 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 94 times [2021-06-12 22:15:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:00,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425511936] [2021-06-12 22:15:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:00,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425511936] [2021-06-12 22:15:00,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425511936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746255760] [2021-06-12 22:15:00,776 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 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 [2021-06-12 22:15:00,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:00,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:00,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746255760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:00,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:00,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:15:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542582258] [2021-06-12 22:15:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:15:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:15:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:15:00,927 INFO L87 Difference]: Start difference. First operand 10754 states and 40921 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) [2021-06-12 22:15:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:01,836 INFO L93 Difference]: Finished difference Result 20426 states and 73440 transitions. [2021-06-12 22:15:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:15:01,836 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 [2021-06-12 22:15:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:01,882 INFO L225 Difference]: With dead ends: 20426 [2021-06-12 22:15:01,882 INFO L226 Difference]: Without dead ends: 20426 [2021-06-12 22:15:01,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:15:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-12 22:15:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 10763. [2021-06-12 22:15:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10763 states, 10762 states have (on average 3.804497305333581) internal successors, (40944), 10762 states have internal predecessors, (40944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 40944 transitions. [2021-06-12 22:15:02,290 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 40944 transitions. Word has length 28 [2021-06-12 22:15:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:02,290 INFO L482 AbstractCegarLoop]: Abstraction has 10763 states and 40944 transitions. [2021-06-12 22:15:02,290 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) [2021-06-12 22:15:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 40944 transitions. [2021-06-12 22:15:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:02,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:02,307 INFO L472 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] [2021-06-12 22:15:02,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:02,521 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash -31074195, now seen corresponding path program 95 times [2021-06-12 22:15:02,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:02,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038623426] [2021-06-12 22:15:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:02,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038623426] [2021-06-12 22:15:02,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038623426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361461310] [2021-06-12 22:15:02,547 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 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 [2021-06-12 22:15:02,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:15:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:02,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361461310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:02,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:02,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:15:02,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726383879] [2021-06-12 22:15:02,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:15:02,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:15:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:15:02,643 INFO L87 Difference]: Start difference. First operand 10763 states and 40944 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) [2021-06-12 22:15:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:03,025 INFO L93 Difference]: Finished difference Result 12782 states and 46713 transitions. [2021-06-12 22:15:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:15:03,025 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 [2021-06-12 22:15:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:03,051 INFO L225 Difference]: With dead ends: 12782 [2021-06-12 22:15:03,051 INFO L226 Difference]: Without dead ends: 12749 [2021-06-12 22:15:03,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:15:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12749 states. [2021-06-12 22:15:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12749 to 10707. [2021-06-12 22:15:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 3.8048757705959275) internal successors, (40735), 10706 states have internal predecessors, (40735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 40735 transitions. [2021-06-12 22:15:03,264 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 40735 transitions. Word has length 28 [2021-06-12 22:15:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:03,264 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 40735 transitions. [2021-06-12 22:15:03,264 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) [2021-06-12 22:15:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 40735 transitions. [2021-06-12 22:15:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:03,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:03,281 INFO L472 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] [2021-06-12 22:15:03,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:03,481 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-12 22:15:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:03,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464892771] [2021-06-12 22:15:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:03,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:03,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464892771] [2021-06-12 22:15:03,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464892771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:03,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801224941] [2021-06-12 22:15:03,520 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 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 [2021-06-12 22:15:03,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:15:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801224941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:03,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:03,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:15:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153283724] [2021-06-12 22:15:03,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:15:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:15:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:15:03,659 INFO L87 Difference]: Start difference. First operand 10707 states and 40735 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) [2021-06-12 22:15:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:04,419 INFO L93 Difference]: Finished difference Result 18923 states and 68585 transitions. [2021-06-12 22:15:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:15:04,419 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 [2021-06-12 22:15:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:04,460 INFO L225 Difference]: With dead ends: 18923 [2021-06-12 22:15:04,460 INFO L226 Difference]: Without dead ends: 18923 [2021-06-12 22:15:04,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:15:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18923 states. [2021-06-12 22:15:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18923 to 10719. [2021-06-12 22:15:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10719 states, 10718 states have (on average 3.8041612241089755) internal successors, (40773), 10718 states have internal predecessors, (40773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10719 states to 10719 states and 40773 transitions. [2021-06-12 22:15:04,794 INFO L78 Accepts]: Start accepts. Automaton has 10719 states and 40773 transitions. Word has length 28 [2021-06-12 22:15:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:04,795 INFO L482 AbstractCegarLoop]: Abstraction has 10719 states and 40773 transitions. [2021-06-12 22:15:04,795 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) [2021-06-12 22:15:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10719 states and 40773 transitions. [2021-06-12 22:15:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:04,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:04,812 INFO L472 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] [2021-06-12 22:15:05,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:05,013 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-12 22:15:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952167090] [2021-06-12 22:15:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952167090] [2021-06-12 22:15:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952167090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251081143] [2021-06-12 22:15:05,047 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 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 [2021-06-12 22:15:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:05,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251081143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:05,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:05,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:15:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7909328] [2021-06-12 22:15:05,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:05,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:05,169 INFO L87 Difference]: Start difference. First operand 10719 states and 40773 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) [2021-06-12 22:15:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:06,396 INFO L93 Difference]: Finished difference Result 19527 states and 70320 transitions. [2021-06-12 22:15:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:15:06,396 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 [2021-06-12 22:15:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:06,446 INFO L225 Difference]: With dead ends: 19527 [2021-06-12 22:15:06,446 INFO L226 Difference]: Without dead ends: 19527 [2021-06-12 22:15:06,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:15:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2021-06-12 22:15:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 10827. [2021-06-12 22:15:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.797062627009052) internal successors, (41107), 10826 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 41107 transitions. [2021-06-12 22:15:06,833 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 41107 transitions. Word has length 28 [2021-06-12 22:15:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:06,833 INFO L482 AbstractCegarLoop]: Abstraction has 10827 states and 41107 transitions. [2021-06-12 22:15:06,833 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) [2021-06-12 22:15:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 41107 transitions. [2021-06-12 22:15:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:06,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:06,851 INFO L472 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] [2021-06-12 22:15:07,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3952 [2021-06-12 22:15:07,057 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-12 22:15:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:07,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722023621] [2021-06-12 22:15:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:07,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722023621] [2021-06-12 22:15:07,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722023621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141061820] [2021-06-12 22:15:07,097 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 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 [2021-06-12 22:15:07,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:07,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141061820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:07,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:07,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:15:07,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565543424] [2021-06-12 22:15:07,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:07,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:07,223 INFO L87 Difference]: Start difference. First operand 10827 states and 41107 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) [2021-06-12 22:15:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:08,227 INFO L93 Difference]: Finished difference Result 19102 states and 69164 transitions. [2021-06-12 22:15:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:15:08,227 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 [2021-06-12 22:15:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:08,267 INFO L225 Difference]: With dead ends: 19102 [2021-06-12 22:15:08,267 INFO L226 Difference]: Without dead ends: 19098 [2021-06-12 22:15:08,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:15:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19098 states. [2021-06-12 22:15:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19098 to 10753. [2021-06-12 22:15:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10753 states, 10752 states have (on average 3.800967261904762) internal successors, (40868), 10752 states have internal predecessors, (40868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10753 states to 10753 states and 40868 transitions. [2021-06-12 22:15:08,564 INFO L78 Accepts]: Start accepts. Automaton has 10753 states and 40868 transitions. Word has length 28 [2021-06-12 22:15:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:08,565 INFO L482 AbstractCegarLoop]: Abstraction has 10753 states and 40868 transitions. [2021-06-12 22:15:08,565 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) [2021-06-12 22:15:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 10753 states and 40868 transitions. [2021-06-12 22:15:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:08,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:08,581 INFO L472 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] [2021-06-12 22:15:08,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3953,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:08,781 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-12 22:15:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915593767] [2021-06-12 22:15:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:08,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:08,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915593767] [2021-06-12 22:15:08,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915593767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:08,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762790503] [2021-06-12 22:15:08,824 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 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 [2021-06-12 22:15:08,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:15:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:08,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762790503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:08,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:08,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:15:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156865170] [2021-06-12 22:15:08,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:08,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:08,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:08,956 INFO L87 Difference]: Start difference. First operand 10753 states and 40868 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) [2021-06-12 22:15:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:10,045 INFO L93 Difference]: Finished difference Result 18533 states and 66656 transitions. [2021-06-12 22:15:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:15:10,045 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 [2021-06-12 22:15:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:10,087 INFO L225 Difference]: With dead ends: 18533 [2021-06-12 22:15:10,087 INFO L226 Difference]: Without dead ends: 18533 [2021-06-12 22:15:10,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:15:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-06-12 22:15:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10980. [2021-06-12 22:15:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.8041716003278987) internal successors, (41766), 10979 states have internal predecessors, (41766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41766 transitions. [2021-06-12 22:15:10,386 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41766 transitions. Word has length 28 [2021-06-12 22:15:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41766 transitions. [2021-06-12 22:15:10,386 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) [2021-06-12 22:15:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41766 transitions. [2021-06-12 22:15:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:10,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:10,403 INFO L472 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] [2021-06-12 22:15:10,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-12 22:15:10,603 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-12 22:15:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:10,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308530108] [2021-06-12 22:15:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:10,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:10,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308530108] [2021-06-12 22:15:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308530108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:10,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371824784] [2021-06-12 22:15:10,646 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 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 [2021-06-12 22:15:10,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:10,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371824784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:10,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:10,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:15:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167965591] [2021-06-12 22:15:10,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:10,780 INFO L87 Difference]: Start difference. First operand 10980 states and 41766 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) [2021-06-12 22:15:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:11,777 INFO L93 Difference]: Finished difference Result 18246 states and 65858 transitions. [2021-06-12 22:15:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:15:11,781 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 [2021-06-12 22:15:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:11,827 INFO L225 Difference]: With dead ends: 18246 [2021-06-12 22:15:11,828 INFO L226 Difference]: Without dead ends: 18234 [2021-06-12 22:15:11,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:15:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2021-06-12 22:15:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 11082. [2021-06-12 22:15:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 3.798303402220016) internal successors, (42089), 11081 states have internal predecessors, (42089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 42089 transitions. [2021-06-12 22:15:12,167 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 42089 transitions. Word has length 28 [2021-06-12 22:15:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:12,167 INFO L482 AbstractCegarLoop]: Abstraction has 11082 states and 42089 transitions. [2021-06-12 22:15:12,167 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) [2021-06-12 22:15:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 42089 transitions. [2021-06-12 22:15:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:12,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:12,185 INFO L472 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] [2021-06-12 22:15:12,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3955,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:12,392 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 72 times [2021-06-12 22:15:12,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:12,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715150248] [2021-06-12 22:15:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:12,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715150248] [2021-06-12 22:15:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715150248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797930077] [2021-06-12 22:15:12,435 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 [2021-06-12 22:15:12,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:12,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:12,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797930077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:12,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:12,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:15:12,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642421238] [2021-06-12 22:15:12,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:12,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:12,536 INFO L87 Difference]: Start difference. First operand 11082 states and 42089 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) [2021-06-12 22:15:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:13,033 INFO L93 Difference]: Finished difference Result 15733 states and 58180 transitions. [2021-06-12 22:15:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:15:13,033 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 [2021-06-12 22:15:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:13,068 INFO L225 Difference]: With dead ends: 15733 [2021-06-12 22:15:13,068 INFO L226 Difference]: Without dead ends: 15733 [2021-06-12 22:15:13,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:15:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2021-06-12 22:15:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 11154. [2021-06-12 22:15:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 3.7938671209540034) internal successors, (42313), 11153 states have internal predecessors, (42313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 42313 transitions. [2021-06-12 22:15:13,331 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 42313 transitions. Word has length 28 [2021-06-12 22:15:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:13,331 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 42313 transitions. [2021-06-12 22:15:13,331 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) [2021-06-12 22:15:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 42313 transitions. [2021-06-12 22:15:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:13,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:13,349 INFO L472 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] [2021-06-12 22:15:13,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-12 22:15:13,565 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 73 times [2021-06-12 22:15:13,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:13,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929053766] [2021-06-12 22:15:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929053766] [2021-06-12 22:15:13,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929053766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436180051] [2021-06-12 22:15:13,599 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 [2021-06-12 22:15:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:13,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436180051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:13,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:13,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:15:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460412511] [2021-06-12 22:15:13,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:15:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:15:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:15:13,686 INFO L87 Difference]: Start difference. First operand 11154 states and 42313 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) [2021-06-12 22:15:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:14,237 INFO L93 Difference]: Finished difference Result 16710 states and 61024 transitions. [2021-06-12 22:15:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:15:14,237 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 [2021-06-12 22:15:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:14,271 INFO L225 Difference]: With dead ends: 16710 [2021-06-12 22:15:14,271 INFO L226 Difference]: Without dead ends: 16710 [2021-06-12 22:15:14,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:15:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-12 22:15:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11484. [2021-06-12 22:15:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.7768875729339024) internal successors, (43370), 11483 states have internal predecessors, (43370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43370 transitions. [2021-06-12 22:15:14,591 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43370 transitions. Word has length 28 [2021-06-12 22:15:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:14,592 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43370 transitions. [2021-06-12 22:15:14,592 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) [2021-06-12 22:15:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43370 transitions. [2021-06-12 22:15:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:14,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:14,612 INFO L472 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] [2021-06-12 22:15:14,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:14,813 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 74 times [2021-06-12 22:15:14,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048583434] [2021-06-12 22:15:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:14,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:14,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048583434] [2021-06-12 22:15:14,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048583434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:14,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135429303] [2021-06-12 22:15:14,850 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 [2021-06-12 22:15:14,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:14,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:14,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:14,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135429303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:14,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:14,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:15:14,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705662699] [2021-06-12 22:15:14,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:15:14,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:15:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:15:14,936 INFO L87 Difference]: Start difference. First operand 11484 states and 43370 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) [2021-06-12 22:15:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:15,402 INFO L93 Difference]: Finished difference Result 16200 states and 59687 transitions. [2021-06-12 22:15:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:15:15,413 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 [2021-06-12 22:15:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:15,449 INFO L225 Difference]: With dead ends: 16200 [2021-06-12 22:15:15,449 INFO L226 Difference]: Without dead ends: 16192 [2021-06-12 22:15:15,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:15:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16192 states. [2021-06-12 22:15:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16192 to 11424. [2021-06-12 22:15:15,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11424 states, 11423 states have (on average 3.7788671977589074) internal successors, (43166), 11423 states have internal predecessors, (43166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11424 states to 11424 states and 43166 transitions. [2021-06-12 22:15:15,711 INFO L78 Accepts]: Start accepts. Automaton has 11424 states and 43166 transitions. Word has length 28 [2021-06-12 22:15:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:15,711 INFO L482 AbstractCegarLoop]: Abstraction has 11424 states and 43166 transitions. [2021-06-12 22:15:15,711 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) [2021-06-12 22:15:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 11424 states and 43166 transitions. [2021-06-12 22:15:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:15,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:15,729 INFO L472 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] [2021-06-12 22:15:15,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3958 [2021-06-12 22:15:15,930 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 75 times [2021-06-12 22:15:15,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:15,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797433408] [2021-06-12 22:15:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:15,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797433408] [2021-06-12 22:15:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797433408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215698132] [2021-06-12 22:15:15,968 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 [2021-06-12 22:15:15,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:15:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215698132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:16,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:16,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:15:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961037196] [2021-06-12 22:15:16,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:16,046 INFO L87 Difference]: Start difference. First operand 11424 states and 43166 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) [2021-06-12 22:15:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:16,487 INFO L93 Difference]: Finished difference Result 16100 states and 59399 transitions. [2021-06-12 22:15:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:15:16,487 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 [2021-06-12 22:15:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:16,522 INFO L225 Difference]: With dead ends: 16100 [2021-06-12 22:15:16,522 INFO L226 Difference]: Without dead ends: 16088 [2021-06-12 22:15:16,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:15:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2021-06-12 22:15:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 11406. [2021-06-12 22:15:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 3.779307321350285) internal successors, (43103), 11405 states have internal predecessors, (43103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 43103 transitions. [2021-06-12 22:15:16,842 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 43103 transitions. Word has length 28 [2021-06-12 22:15:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:16,842 INFO L482 AbstractCegarLoop]: Abstraction has 11406 states and 43103 transitions. [2021-06-12 22:15:16,842 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) [2021-06-12 22:15:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 43103 transitions. [2021-06-12 22:15:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:16,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:16,858 INFO L472 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] [2021-06-12 22:15:17,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-12 22:15:17,058 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 76 times [2021-06-12 22:15:17,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:17,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848929960] [2021-06-12 22:15:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:17,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848929960] [2021-06-12 22:15:17,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848929960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073260453] [2021-06-12 22:15:17,093 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 [2021-06-12 22:15:17,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:17,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073260453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:17,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:15:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933037207] [2021-06-12 22:15:17,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:15:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:15:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:15:17,208 INFO L87 Difference]: Start difference. First operand 11406 states and 43103 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) [2021-06-12 22:15:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:18,145 INFO L93 Difference]: Finished difference Result 21916 states and 78065 transitions. [2021-06-12 22:15:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:15:18,145 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 [2021-06-12 22:15:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:18,189 INFO L225 Difference]: With dead ends: 21916 [2021-06-12 22:15:18,189 INFO L226 Difference]: Without dead ends: 21916 [2021-06-12 22:15:18,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:15:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21916 states. [2021-06-12 22:15:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21916 to 11388. [2021-06-12 22:15:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11388 states, 11387 states have (on average 3.7779924475278825) internal successors, (43020), 11387 states have internal predecessors, (43020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11388 states to 11388 states and 43020 transitions. [2021-06-12 22:15:18,500 INFO L78 Accepts]: Start accepts. Automaton has 11388 states and 43020 transitions. Word has length 28 [2021-06-12 22:15:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:18,501 INFO L482 AbstractCegarLoop]: Abstraction has 11388 states and 43020 transitions. [2021-06-12 22:15:18,501 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) [2021-06-12 22:15:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 11388 states and 43020 transitions. [2021-06-12 22:15:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:18,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:18,518 INFO L472 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] [2021-06-12 22:15:18,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:18,719 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:18,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1660375731, now seen corresponding path program 101 times [2021-06-12 22:15:18,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:18,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548661782] [2021-06-12 22:15:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:18,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:18,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548661782] [2021-06-12 22:15:18,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548661782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:18,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687341115] [2021-06-12 22:15:18,747 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 [2021-06-12 22:15:18,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:15:18,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:18,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687341115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:18,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:18,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:15:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904986787] [2021-06-12 22:15:18,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:18,854 INFO L87 Difference]: Start difference. First operand 11388 states and 43020 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) [2021-06-12 22:15:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:19,587 INFO L93 Difference]: Finished difference Result 17700 states and 63852 transitions. [2021-06-12 22:15:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:15:19,588 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 [2021-06-12 22:15:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:19,629 INFO L225 Difference]: With dead ends: 17700 [2021-06-12 22:15:19,629 INFO L226 Difference]: Without dead ends: 17684 [2021-06-12 22:15:19,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:15:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17684 states. [2021-06-12 22:15:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17684 to 12696. [2021-06-12 22:15:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12696 states, 12695 states have (on average 3.8450571090980703) internal successors, (48813), 12695 states have internal predecessors, (48813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 48813 transitions. [2021-06-12 22:15:19,986 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 48813 transitions. Word has length 28 [2021-06-12 22:15:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:19,986 INFO L482 AbstractCegarLoop]: Abstraction has 12696 states and 48813 transitions. [2021-06-12 22:15:19,986 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) [2021-06-12 22:15:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 48813 transitions. [2021-06-12 22:15:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:20,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:20,007 INFO L472 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] [2021-06-12 22:15:20,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:20,208 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1748793285, now seen corresponding path program 102 times [2021-06-12 22:15:20,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:20,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22075517] [2021-06-12 22:15:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:20,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22075517] [2021-06-12 22:15:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22075517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259888455] [2021-06-12 22:15:20,234 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 [2021-06-12 22:15:20,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:15:20,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:20,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259888455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:20,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:20,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:15:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71784458] [2021-06-12 22:15:20,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:20,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:20,340 INFO L87 Difference]: Start difference. First operand 12696 states and 48813 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) [2021-06-12 22:15:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:21,130 INFO L93 Difference]: Finished difference Result 17792 states and 64097 transitions. [2021-06-12 22:15:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:15:21,131 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 [2021-06-12 22:15:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:21,168 INFO L225 Difference]: With dead ends: 17792 [2021-06-12 22:15:21,168 INFO L226 Difference]: Without dead ends: 17786 [2021-06-12 22:15:21,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:15:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2021-06-12 22:15:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 12666. [2021-06-12 22:15:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12666 states, 12665 states have (on average 3.844295302013423) internal successors, (48688), 12665 states have internal predecessors, (48688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12666 states to 12666 states and 48688 transitions. [2021-06-12 22:15:21,496 INFO L78 Accepts]: Start accepts. Automaton has 12666 states and 48688 transitions. Word has length 28 [2021-06-12 22:15:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:21,496 INFO L482 AbstractCegarLoop]: Abstraction has 12666 states and 48688 transitions. [2021-06-12 22:15:21,496 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) [2021-06-12 22:15:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 12666 states and 48688 transitions. [2021-06-12 22:15:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:21,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:21,517 INFO L472 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] [2021-06-12 22:15:21,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:21,733 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1491665525, now seen corresponding path program 103 times [2021-06-12 22:15:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:21,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076610442] [2021-06-12 22:15:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:21,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:21,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076610442] [2021-06-12 22:15:21,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076610442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:21,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45358270] [2021-06-12 22:15:21,760 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 [2021-06-12 22:15:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:21,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45358270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:21,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:21,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:15:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980785436] [2021-06-12 22:15:21,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:21,891 INFO L87 Difference]: Start difference. First operand 12666 states and 48688 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) [2021-06-12 22:15:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:22,565 INFO L93 Difference]: Finished difference Result 19854 states and 71614 transitions. [2021-06-12 22:15:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:15:22,565 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 [2021-06-12 22:15:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:22,605 INFO L225 Difference]: With dead ends: 19854 [2021-06-12 22:15:22,605 INFO L226 Difference]: Without dead ends: 19838 [2021-06-12 22:15:22,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:15:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19838 states. [2021-06-12 22:15:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19838 to 12721. [2021-06-12 22:15:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 3.8488207547169813) internal successors, (48957), 12720 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 48957 transitions. [2021-06-12 22:15:22,949 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 48957 transitions. Word has length 28 [2021-06-12 22:15:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:22,949 INFO L482 AbstractCegarLoop]: Abstraction has 12721 states and 48957 transitions. [2021-06-12 22:15:22,949 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) [2021-06-12 22:15:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 48957 transitions. [2021-06-12 22:15:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:22,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:22,970 INFO L472 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] [2021-06-12 22:15:23,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:23,171 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-12 22:15:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:23,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598813837] [2021-06-12 22:15:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:23,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598813837] [2021-06-12 22:15:23,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598813837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454124147] [2021-06-12 22:15:23,203 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 [2021-06-12 22:15:23,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:23,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454124147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:23,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:23,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:15:23,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105555379] [2021-06-12 22:15:23,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:23,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:23,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:23,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:23,302 INFO L87 Difference]: Start difference. First operand 12721 states and 48957 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) [2021-06-12 22:15:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:23,991 INFO L93 Difference]: Finished difference Result 20992 states and 75172 transitions. [2021-06-12 22:15:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:15:23,992 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 [2021-06-12 22:15:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:24,032 INFO L225 Difference]: With dead ends: 20992 [2021-06-12 22:15:24,032 INFO L226 Difference]: Without dead ends: 20992 [2021-06-12 22:15:24,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:15:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20992 states. [2021-06-12 22:15:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20992 to 12737. [2021-06-12 22:15:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12737 states, 12736 states have (on average 3.845791457286432) internal successors, (48980), 12736 states have internal predecessors, (48980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12737 states to 12737 states and 48980 transitions. [2021-06-12 22:15:24,364 INFO L78 Accepts]: Start accepts. Automaton has 12737 states and 48980 transitions. Word has length 28 [2021-06-12 22:15:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 12737 states and 48980 transitions. [2021-06-12 22:15:24,365 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) [2021-06-12 22:15:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12737 states and 48980 transitions. [2021-06-12 22:15:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:24,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:24,385 INFO L472 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] [2021-06-12 22:15:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:24,589 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 77 times [2021-06-12 22:15:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953531645] [2021-06-12 22:15:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:24,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953531645] [2021-06-12 22:15:24,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953531645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889633838] [2021-06-12 22:15:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:15:24,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:15:24,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:24,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889633838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:24,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:24,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:15:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690619591] [2021-06-12 22:15:24,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:24,728 INFO L87 Difference]: Start difference. First operand 12737 states and 48980 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) [2021-06-12 22:15:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:25,704 INFO L93 Difference]: Finished difference Result 22133 states and 81225 transitions. [2021-06-12 22:15:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:15:25,704 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 [2021-06-12 22:15:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:25,755 INFO L225 Difference]: With dead ends: 22133 [2021-06-12 22:15:25,755 INFO L226 Difference]: Without dead ends: 22129 [2021-06-12 22:15:25,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:15:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22129 states. [2021-06-12 22:15:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22129 to 12991. [2021-06-12 22:15:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.8354888375673597) internal successors, (49823), 12990 states have internal predecessors, (49823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 49823 transitions. [2021-06-12 22:15:26,094 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 49823 transitions. Word has length 28 [2021-06-12 22:15:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:26,094 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 49823 transitions. [2021-06-12 22:15:26,094 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) [2021-06-12 22:15:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 49823 transitions. [2021-06-12 22:15:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:26,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:26,116 INFO L472 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] [2021-06-12 22:15:26,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:26,316 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1750460849, now seen corresponding path program 105 times [2021-06-12 22:15:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698102640] [2021-06-12 22:15:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:26,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:26,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698102640] [2021-06-12 22:15:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698102640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:26,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046322687] [2021-06-12 22:15:26,347 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 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 [2021-06-12 22:15:26,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:15:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046322687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:26,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:26,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:15:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591456087] [2021-06-12 22:15:26,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:26,440 INFO L87 Difference]: Start difference. First operand 12991 states and 49823 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) [2021-06-12 22:15:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:27,080 INFO L93 Difference]: Finished difference Result 18794 states and 68812 transitions. [2021-06-12 22:15:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:15:27,080 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 [2021-06-12 22:15:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:27,122 INFO L225 Difference]: With dead ends: 18794 [2021-06-12 22:15:27,122 INFO L226 Difference]: Without dead ends: 18768 [2021-06-12 22:15:27,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:15:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18768 states. [2021-06-12 22:15:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18768 to 13271. [2021-06-12 22:15:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 3.853654860587792) internal successors, (51138), 13270 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 51138 transitions. [2021-06-12 22:15:27,448 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 51138 transitions. Word has length 28 [2021-06-12 22:15:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:27,448 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 51138 transitions. [2021-06-12 22:15:27,448 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) [2021-06-12 22:15:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 51138 transitions. [2021-06-12 22:15:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:27,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:27,469 INFO L472 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] [2021-06-12 22:15:27,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-06-12 22:15:27,669 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-12 22:15:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:27,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514616207] [2021-06-12 22:15:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:27,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514616207] [2021-06-12 22:15:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514616207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421186456] [2021-06-12 22:15:27,699 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 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 [2021-06-12 22:15:27,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:27,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:27,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421186456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:15:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713231253] [2021-06-12 22:15:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:27,789 INFO L87 Difference]: Start difference. First operand 13271 states and 51138 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) [2021-06-12 22:15:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:28,567 INFO L93 Difference]: Finished difference Result 18772 states and 67861 transitions. [2021-06-12 22:15:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:15:28,567 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 [2021-06-12 22:15:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:28,604 INFO L225 Difference]: With dead ends: 18772 [2021-06-12 22:15:28,604 INFO L226 Difference]: Without dead ends: 18772 [2021-06-12 22:15:28,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:15:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2021-06-12 22:15:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 13226. [2021-06-12 22:15:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 13225 states have (on average 3.8455198487712665) internal successors, (50857), 13225 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 50857 transitions. [2021-06-12 22:15:28,912 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 50857 transitions. Word has length 28 [2021-06-12 22:15:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:28,912 INFO L482 AbstractCegarLoop]: Abstraction has 13226 states and 50857 transitions. [2021-06-12 22:15:28,912 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) [2021-06-12 22:15:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 50857 transitions. [2021-06-12 22:15:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:28,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:28,932 INFO L472 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] [2021-06-12 22:15:29,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:29,133 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-12 22:15:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734646650] [2021-06-12 22:15:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:29,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734646650] [2021-06-12 22:15:29,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734646650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572247402] [2021-06-12 22:15:29,164 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 [2021-06-12 22:15:29,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:15:29,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572247402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:15:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721614487] [2021-06-12 22:15:29,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:29,263 INFO L87 Difference]: Start difference. First operand 13226 states and 50857 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) [2021-06-12 22:15:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:29,949 INFO L93 Difference]: Finished difference Result 20120 states and 73134 transitions. [2021-06-12 22:15:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:15:29,949 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 [2021-06-12 22:15:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:29,989 INFO L225 Difference]: With dead ends: 20120 [2021-06-12 22:15:29,989 INFO L226 Difference]: Without dead ends: 20120 [2021-06-12 22:15:29,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:15:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-12 22:15:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 13939. [2021-06-12 22:15:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 13938 states have (on average 3.8318266609269624) internal successors, (53408), 13938 states have internal predecessors, (53408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 53408 transitions. [2021-06-12 22:15:30,292 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 53408 transitions. Word has length 28 [2021-06-12 22:15:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:30,292 INFO L482 AbstractCegarLoop]: Abstraction has 13939 states and 53408 transitions. [2021-06-12 22:15:30,292 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) [2021-06-12 22:15:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 53408 transitions. [2021-06-12 22:15:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:30,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:30,313 INFO L472 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] [2021-06-12 22:15:30,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-12 22:15:30,514 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-12 22:15:30,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:30,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482910363] [2021-06-12 22:15:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:30,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:30,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482910363] [2021-06-12 22:15:30,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482910363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:30,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646536520] [2021-06-12 22:15:30,544 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 [2021-06-12 22:15:30,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646536520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:30,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:30,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:15:30,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911055652] [2021-06-12 22:15:30,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:30,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:30,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:30,642 INFO L87 Difference]: Start difference. First operand 13939 states and 53408 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) [2021-06-12 22:15:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:31,534 INFO L93 Difference]: Finished difference Result 22535 states and 80778 transitions. [2021-06-12 22:15:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:15:31,534 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 [2021-06-12 22:15:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:31,581 INFO L225 Difference]: With dead ends: 22535 [2021-06-12 22:15:31,581 INFO L226 Difference]: Without dead ends: 22535 [2021-06-12 22:15:31,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:15:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-06-12 22:15:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 14169. [2021-06-12 22:15:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 14168 states have (on average 3.8435206098249575) internal successors, (54455), 14168 states have internal predecessors, (54455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 54455 transitions. [2021-06-12 22:15:31,909 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 54455 transitions. Word has length 28 [2021-06-12 22:15:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:31,909 INFO L482 AbstractCegarLoop]: Abstraction has 14169 states and 54455 transitions. [2021-06-12 22:15:31,909 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) [2021-06-12 22:15:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 54455 transitions. [2021-06-12 22:15:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:31,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:31,931 INFO L472 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] [2021-06-12 22:15:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:32,132 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 78 times [2021-06-12 22:15:32,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:32,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717654811] [2021-06-12 22:15:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:32,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:32,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717654811] [2021-06-12 22:15:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717654811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:32,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395790617] [2021-06-12 22:15:32,165 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 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 [2021-06-12 22:15:32,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:15:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395790617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:32,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:15:32,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032301425] [2021-06-12 22:15:32,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:32,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:32,291 INFO L87 Difference]: Start difference. First operand 14169 states and 54455 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) [2021-06-12 22:15:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:33,783 INFO L93 Difference]: Finished difference Result 39203 states and 140890 transitions. [2021-06-12 22:15:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:15:33,783 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 [2021-06-12 22:15:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:33,870 INFO L225 Difference]: With dead ends: 39203 [2021-06-12 22:15:33,870 INFO L226 Difference]: Without dead ends: 39203 [2021-06-12 22:15:33,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:15:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39203 states. [2021-06-12 22:15:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39203 to 15405. [2021-06-12 22:15:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15405 states, 15404 states have (on average 3.890028564009348) internal successors, (59922), 15404 states have internal predecessors, (59922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15405 states to 15405 states and 59922 transitions. [2021-06-12 22:15:34,450 INFO L78 Accepts]: Start accepts. Automaton has 15405 states and 59922 transitions. Word has length 28 [2021-06-12 22:15:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:34,451 INFO L482 AbstractCegarLoop]: Abstraction has 15405 states and 59922 transitions. [2021-06-12 22:15:34,451 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) [2021-06-12 22:15:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 15405 states and 59922 transitions. [2021-06-12 22:15:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:34,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:34,475 INFO L472 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] [2021-06-12 22:15:34,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:34,676 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 79 times [2021-06-12 22:15:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:34,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312551495] [2021-06-12 22:15:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:34,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312551495] [2021-06-12 22:15:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312551495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814389125] [2021-06-12 22:15:34,713 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 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 [2021-06-12 22:15:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814389125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:34,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:34,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:15:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284498966] [2021-06-12 22:15:34,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:34,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:34,835 INFO L87 Difference]: Start difference. First operand 15405 states and 59922 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) [2021-06-12 22:15:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:36,349 INFO L93 Difference]: Finished difference Result 38231 states and 138333 transitions. [2021-06-12 22:15:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:15:36,349 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 [2021-06-12 22:15:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:36,441 INFO L225 Difference]: With dead ends: 38231 [2021-06-12 22:15:36,441 INFO L226 Difference]: Without dead ends: 38231 [2021-06-12 22:15:36,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 916.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:15:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38231 states. [2021-06-12 22:15:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38231 to 15379. [2021-06-12 22:15:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15379 states, 15378 states have (on average 3.886461178306672) internal successors, (59766), 15378 states have internal predecessors, (59766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15379 states to 15379 states and 59766 transitions. [2021-06-12 22:15:37,063 INFO L78 Accepts]: Start accepts. Automaton has 15379 states and 59766 transitions. Word has length 28 [2021-06-12 22:15:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:37,063 INFO L482 AbstractCegarLoop]: Abstraction has 15379 states and 59766 transitions. [2021-06-12 22:15:37,063 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) [2021-06-12 22:15:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15379 states and 59766 transitions. [2021-06-12 22:15:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:37,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:37,087 INFO L472 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] [2021-06-12 22:15:37,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:37,290 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-12 22:15:37,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:37,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586365405] [2021-06-12 22:15:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:37,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:37,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586365405] [2021-06-12 22:15:37,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586365405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:37,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222012643] [2021-06-12 22:15:37,322 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 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 [2021-06-12 22:15:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:37,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222012643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:37,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:37,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:15:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361317216] [2021-06-12 22:15:37,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:15:37,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:15:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:15:37,397 INFO L87 Difference]: Start difference. First operand 15379 states and 59766 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) [2021-06-12 22:15:37,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:37,675 INFO L93 Difference]: Finished difference Result 23740 states and 90889 transitions. [2021-06-12 22:15:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:15:37,676 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 [2021-06-12 22:15:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:37,728 INFO L225 Difference]: With dead ends: 23740 [2021-06-12 22:15:37,728 INFO L226 Difference]: Without dead ends: 23693 [2021-06-12 22:15:37,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23693 states. [2021-06-12 22:15:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23693 to 20498. [2021-06-12 22:15:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20498 states, 20497 states have (on average 3.9016441430453237) internal successors, (79972), 20497 states have internal predecessors, (79972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20498 states to 20498 states and 79972 transitions. [2021-06-12 22:15:38,165 INFO L78 Accepts]: Start accepts. Automaton has 20498 states and 79972 transitions. Word has length 28 [2021-06-12 22:15:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:38,165 INFO L482 AbstractCegarLoop]: Abstraction has 20498 states and 79972 transitions. [2021-06-12 22:15:38,165 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) [2021-06-12 22:15:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20498 states and 79972 transitions. [2021-06-12 22:15:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:38,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:38,200 INFO L472 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] [2021-06-12 22:15:38,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:38,403 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-12 22:15:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:38,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679336401] [2021-06-12 22:15:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:38,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:38,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679336401] [2021-06-12 22:15:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679336401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:38,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402964504] [2021-06-12 22:15:38,430 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 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 [2021-06-12 22:15:38,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:15:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:38,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402964504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:38,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:38,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:15:38,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950069698] [2021-06-12 22:15:38,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:15:38,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:15:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:15:38,507 INFO L87 Difference]: Start difference. First operand 20498 states and 79972 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) [2021-06-12 22:15:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:38,744 INFO L93 Difference]: Finished difference Result 23252 states and 88342 transitions. [2021-06-12 22:15:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:15:38,745 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 [2021-06-12 22:15:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:38,902 INFO L225 Difference]: With dead ends: 23252 [2021-06-12 22:15:38,902 INFO L226 Difference]: Without dead ends: 23252 [2021-06-12 22:15:38,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:15:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23252 states. [2021-06-12 22:15:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23252 to 20001. [2021-06-12 22:15:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20001 states, 20000 states have (on average 3.89) internal successors, (77800), 20000 states have internal predecessors, (77800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 77800 transitions. [2021-06-12 22:15:39,300 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 77800 transitions. Word has length 28 [2021-06-12 22:15:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:39,300 INFO L482 AbstractCegarLoop]: Abstraction has 20001 states and 77800 transitions. [2021-06-12 22:15:39,300 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) [2021-06-12 22:15:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 77800 transitions. [2021-06-12 22:15:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:39,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:39,332 INFO L472 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] [2021-06-12 22:15:39,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-06-12 22:15:39,548 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-12 22:15:39,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891893927] [2021-06-12 22:15:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:39,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891893927] [2021-06-12 22:15:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891893927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565824800] [2021-06-12 22:15:39,585 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 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 [2021-06-12 22:15:39,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:39,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:39,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565824800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:39,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:39,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:15:39,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202008220] [2021-06-12 22:15:39,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:15:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:15:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:15:39,703 INFO L87 Difference]: Start difference. First operand 20001 states and 77800 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) [2021-06-12 22:15:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:40,687 INFO L93 Difference]: Finished difference Result 31840 states and 117907 transitions. [2021-06-12 22:15:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:15:40,688 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 [2021-06-12 22:15:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:40,769 INFO L225 Difference]: With dead ends: 31840 [2021-06-12 22:15:40,770 INFO L226 Difference]: Without dead ends: 31840 [2021-06-12 22:15:40,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:15:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2021-06-12 22:15:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 20067. [2021-06-12 22:15:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20067 states, 20066 states have (on average 3.888069371075451) internal successors, (78018), 20066 states have internal predecessors, (78018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20067 states to 20067 states and 78018 transitions. [2021-06-12 22:15:41,386 INFO L78 Accepts]: Start accepts. Automaton has 20067 states and 78018 transitions. Word has length 28 [2021-06-12 22:15:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:41,387 INFO L482 AbstractCegarLoop]: Abstraction has 20067 states and 78018 transitions. [2021-06-12 22:15:41,387 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) [2021-06-12 22:15:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 20067 states and 78018 transitions. [2021-06-12 22:15:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:41,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:41,420 INFO L472 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] [2021-06-12 22:15:41,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:41,621 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:41,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-12 22:15:41,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:41,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797896037] [2021-06-12 22:15:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:41,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797896037] [2021-06-12 22:15:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797896037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784014299] [2021-06-12 22:15:41,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:41,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:41,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:41,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784014299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:41,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:15:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032866710] [2021-06-12 22:15:41,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:41,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:41,785 INFO L87 Difference]: Start difference. First operand 20067 states and 78018 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) [2021-06-12 22:15:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:43,321 INFO L93 Difference]: Finished difference Result 40672 states and 148990 transitions. [2021-06-12 22:15:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:15:43,322 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 [2021-06-12 22:15:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:43,422 INFO L225 Difference]: With dead ends: 40672 [2021-06-12 22:15:43,422 INFO L226 Difference]: Without dead ends: 40672 [2021-06-12 22:15:43,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 867.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:15:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40672 states. [2021-06-12 22:15:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40672 to 20072. [2021-06-12 22:15:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20072 states, 20071 states have (on average 3.8901400029893876) internal successors, (78079), 20071 states have internal predecessors, (78079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20072 states to 20072 states and 78079 transitions. [2021-06-12 22:15:43,982 INFO L78 Accepts]: Start accepts. Automaton has 20072 states and 78079 transitions. Word has length 28 [2021-06-12 22:15:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:43,982 INFO L482 AbstractCegarLoop]: Abstraction has 20072 states and 78079 transitions. [2021-06-12 22:15:43,982 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) [2021-06-12 22:15:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20072 states and 78079 transitions. [2021-06-12 22:15:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:44,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:44,134 INFO L472 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] [2021-06-12 22:15:44,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:44,334 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-12 22:15:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:44,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059539251] [2021-06-12 22:15:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:44,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:44,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059539251] [2021-06-12 22:15:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059539251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728104138] [2021-06-12 22:15:44,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:44,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:15:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:44,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728104138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:44,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:44,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:15:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692501229] [2021-06-12 22:15:44,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:15:44,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:15:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:15:44,486 INFO L87 Difference]: Start difference. First operand 20072 states and 78079 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) [2021-06-12 22:15:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:45,953 INFO L93 Difference]: Finished difference Result 40237 states and 148140 transitions. [2021-06-12 22:15:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:15:45,953 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 [2021-06-12 22:15:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:46,070 INFO L225 Difference]: With dead ends: 40237 [2021-06-12 22:15:46,070 INFO L226 Difference]: Without dead ends: 40237 [2021-06-12 22:15:46,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 860.9ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:15:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40237 states. [2021-06-12 22:15:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40237 to 19860. [2021-06-12 22:15:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19860 states, 19859 states have (on average 3.8822700035248503) internal successors, (77098), 19859 states have internal predecessors, (77098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19860 states to 19860 states and 77098 transitions. [2021-06-12 22:15:46,673 INFO L78 Accepts]: Start accepts. Automaton has 19860 states and 77098 transitions. Word has length 28 [2021-06-12 22:15:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:46,673 INFO L482 AbstractCegarLoop]: Abstraction has 19860 states and 77098 transitions. [2021-06-12 22:15:46,673 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) [2021-06-12 22:15:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19860 states and 77098 transitions. [2021-06-12 22:15:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:46,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:46,704 INFO L472 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] [2021-06-12 22:15:46,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3976 [2021-06-12 22:15:46,904 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-12 22:15:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:46,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619620831] [2021-06-12 22:15:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:46,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619620831] [2021-06-12 22:15:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619620831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309982508] [2021-06-12 22:15:46,936 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 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 [2021-06-12 22:15:46,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:15:46,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:15:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309982508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:47,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:47,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:15:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338314404] [2021-06-12 22:15:47,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:15:47,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:15:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:15:47,019 INFO L87 Difference]: Start difference. First operand 19860 states and 77098 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) [2021-06-12 22:15:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:47,353 INFO L93 Difference]: Finished difference Result 29387 states and 109674 transitions. [2021-06-12 22:15:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:15:47,354 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 [2021-06-12 22:15:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:47,415 INFO L225 Difference]: With dead ends: 29387 [2021-06-12 22:15:47,415 INFO L226 Difference]: Without dead ends: 29370 [2021-06-12 22:15:47,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:15:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29370 states. [2021-06-12 22:15:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29370 to 20128. [2021-06-12 22:15:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 20127 states have (on average 3.887812391315149) internal successors, (78250), 20127 states have internal predecessors, (78250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 78250 transitions. [2021-06-12 22:15:47,854 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 78250 transitions. Word has length 28 [2021-06-12 22:15:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:47,854 INFO L482 AbstractCegarLoop]: Abstraction has 20128 states and 78250 transitions. [2021-06-12 22:15:47,854 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) [2021-06-12 22:15:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 78250 transitions. [2021-06-12 22:15:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:47,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:47,884 INFO L472 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] [2021-06-12 22:15:48,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3977,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:48,085 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-12 22:15:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887819918] [2021-06-12 22:15:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:48,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887819918] [2021-06-12 22:15:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887819918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150331993] [2021-06-12 22:15:48,129 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 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 [2021-06-12 22:15:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:15:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:48,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150331993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:48,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:48,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:15:48,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237594114] [2021-06-12 22:15:48,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:15:48,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:15:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:15:48,208 INFO L87 Difference]: Start difference. First operand 20128 states and 78250 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) [2021-06-12 22:15:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:48,507 INFO L93 Difference]: Finished difference Result 31182 states and 115264 transitions. [2021-06-12 22:15:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:15:48,507 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 [2021-06-12 22:15:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:48,589 INFO L225 Difference]: With dead ends: 31182 [2021-06-12 22:15:48,589 INFO L226 Difference]: Without dead ends: 31182 [2021-06-12 22:15:48,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31182 states. [2021-06-12 22:15:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31182 to 19797. [2021-06-12 22:15:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19797 states, 19796 states have (on average 3.8727015558698725) internal successors, (76664), 19796 states have internal predecessors, (76664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19797 states to 19797 states and 76664 transitions. [2021-06-12 22:15:49,055 INFO L78 Accepts]: Start accepts. Automaton has 19797 states and 76664 transitions. Word has length 28 [2021-06-12 22:15:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:49,055 INFO L482 AbstractCegarLoop]: Abstraction has 19797 states and 76664 transitions. [2021-06-12 22:15:49,055 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) [2021-06-12 22:15:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19797 states and 76664 transitions. [2021-06-12 22:15:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:49,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:49,085 INFO L472 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] [2021-06-12 22:15:49,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-12 22:15:49,286 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-12 22:15:49,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:49,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751401873] [2021-06-12 22:15:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:49,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751401873] [2021-06-12 22:15:49,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751401873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647206159] [2021-06-12 22:15:49,333 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 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 [2021-06-12 22:15:49,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:49,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:49,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647206159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:49,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:49,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:15:49,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622735880] [2021-06-12 22:15:49,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:49,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:49,426 INFO L87 Difference]: Start difference. First operand 19797 states and 76664 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) [2021-06-12 22:15:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:50,260 INFO L93 Difference]: Finished difference Result 29369 states and 109123 transitions. [2021-06-12 22:15:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:15:50,260 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 [2021-06-12 22:15:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:50,337 INFO L225 Difference]: With dead ends: 29369 [2021-06-12 22:15:50,337 INFO L226 Difference]: Without dead ends: 29369 [2021-06-12 22:15:50,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:15:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29369 states. [2021-06-12 22:15:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29369 to 19845. [2021-06-12 22:15:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19845 states, 19844 states have (on average 3.871497681918968) internal successors, (76826), 19844 states have internal predecessors, (76826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19845 states to 19845 states and 76826 transitions. [2021-06-12 22:15:50,820 INFO L78 Accepts]: Start accepts. Automaton has 19845 states and 76826 transitions. Word has length 28 [2021-06-12 22:15:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:50,821 INFO L482 AbstractCegarLoop]: Abstraction has 19845 states and 76826 transitions. [2021-06-12 22:15:50,821 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) [2021-06-12 22:15:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19845 states and 76826 transitions. [2021-06-12 22:15:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:50,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:50,855 INFO L472 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] [2021-06-12 22:15:51,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:51,055 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-12 22:15:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:51,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836270708] [2021-06-12 22:15:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:51,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836270708] [2021-06-12 22:15:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836270708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977827435] [2021-06-12 22:15:51,094 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 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 [2021-06-12 22:15:51,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:51,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977827435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:51,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:51,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:15:51,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328348366] [2021-06-12 22:15:51,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:51,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:51,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:51,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:51,190 INFO L87 Difference]: Start difference. First operand 19845 states and 76826 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) [2021-06-12 22:15:52,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:52,199 INFO L93 Difference]: Finished difference Result 30894 states and 113497 transitions. [2021-06-12 22:15:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:15:52,199 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 [2021-06-12 22:15:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:52,284 INFO L225 Difference]: With dead ends: 30894 [2021-06-12 22:15:52,284 INFO L226 Difference]: Without dead ends: 30894 [2021-06-12 22:15:52,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:15:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30894 states. [2021-06-12 22:15:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30894 to 20391. [2021-06-12 22:15:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20391 states, 20390 states have (on average 3.8505640019617458) internal successors, (78513), 20390 states have internal predecessors, (78513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20391 states to 20391 states and 78513 transitions. [2021-06-12 22:15:52,883 INFO L78 Accepts]: Start accepts. Automaton has 20391 states and 78513 transitions. Word has length 28 [2021-06-12 22:15:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:52,883 INFO L482 AbstractCegarLoop]: Abstraction has 20391 states and 78513 transitions. [2021-06-12 22:15:52,884 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) [2021-06-12 22:15:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 20391 states and 78513 transitions. [2021-06-12 22:15:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:52,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:52,917 INFO L472 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] [2021-06-12 22:15:53,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-12 22:15:53,117 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-12 22:15:53,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:53,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759382726] [2021-06-12 22:15:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759382726] [2021-06-12 22:15:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759382726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287230751] [2021-06-12 22:15:53,152 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 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 [2021-06-12 22:15:53,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287230751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:53,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:53,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:15:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042755713] [2021-06-12 22:15:53,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:53,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:53,240 INFO L87 Difference]: Start difference. First operand 20391 states and 78513 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) [2021-06-12 22:15:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:54,123 INFO L93 Difference]: Finished difference Result 30020 states and 111194 transitions. [2021-06-12 22:15:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:15:54,124 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 [2021-06-12 22:15:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:54,205 INFO L225 Difference]: With dead ends: 30020 [2021-06-12 22:15:54,205 INFO L226 Difference]: Without dead ends: 30016 [2021-06-12 22:15:54,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:15:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30016 states. [2021-06-12 22:15:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30016 to 20283. [2021-06-12 22:15:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20283 states, 20282 states have (on average 3.8532196035893898) internal successors, (78151), 20282 states have internal predecessors, (78151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 78151 transitions. [2021-06-12 22:15:54,704 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 78151 transitions. Word has length 28 [2021-06-12 22:15:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:54,704 INFO L482 AbstractCegarLoop]: Abstraction has 20283 states and 78151 transitions. [2021-06-12 22:15:54,704 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) [2021-06-12 22:15:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 78151 transitions. [2021-06-12 22:15:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:54,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:54,736 INFO L472 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] [2021-06-12 22:15:54,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:54,951 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-12 22:15:54,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:54,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206968714] [2021-06-12 22:15:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:54,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206968714] [2021-06-12 22:15:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206968714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126822333] [2021-06-12 22:15:54,978 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 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 [2021-06-12 22:15:55,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:15:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:15:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:15:55,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126822333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:55,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:55,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:15:55,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520613698] [2021-06-12 22:15:55,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:15:55,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:55,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:15:55,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:15:55,054 INFO L87 Difference]: Start difference. First operand 20283 states and 78151 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) [2021-06-12 22:15:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:55,278 INFO L93 Difference]: Finished difference Result 25295 states and 94083 transitions. [2021-06-12 22:15:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:15:55,278 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 [2021-06-12 22:15:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:55,336 INFO L225 Difference]: With dead ends: 25295 [2021-06-12 22:15:55,336 INFO L226 Difference]: Without dead ends: 25295 [2021-06-12 22:15:55,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:15:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2021-06-12 22:15:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 20593. [2021-06-12 22:15:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20593 states, 20592 states have (on average 3.8444055944055946) internal successors, (79164), 20592 states have internal predecessors, (79164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20593 states to 20593 states and 79164 transitions. [2021-06-12 22:15:55,784 INFO L78 Accepts]: Start accepts. Automaton has 20593 states and 79164 transitions. Word has length 28 [2021-06-12 22:15:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:55,784 INFO L482 AbstractCegarLoop]: Abstraction has 20593 states and 79164 transitions. [2021-06-12 22:15:55,784 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) [2021-06-12 22:15:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20593 states and 79164 transitions. [2021-06-12 22:15:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:55,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:55,819 INFO L472 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] [2021-06-12 22:15:56,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:56,019 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-12 22:15:56,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:56,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46279265] [2021-06-12 22:15:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:56,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46279265] [2021-06-12 22:15:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46279265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181675580] [2021-06-12 22:15:56,068 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 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 [2021-06-12 22:15:56,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:15:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:56,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181675580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:56,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:56,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:15:56,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345763717] [2021-06-12 22:15:56,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:56,161 INFO L87 Difference]: Start difference. First operand 20593 states and 79164 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) [2021-06-12 22:15:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:56,978 INFO L93 Difference]: Finished difference Result 31016 states and 113583 transitions. [2021-06-12 22:15:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:15:56,978 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 [2021-06-12 22:15:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:57,056 INFO L225 Difference]: With dead ends: 31016 [2021-06-12 22:15:57,056 INFO L226 Difference]: Without dead ends: 31016 [2021-06-12 22:15:57,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:15:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31016 states. [2021-06-12 22:15:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31016 to 22203. [2021-06-12 22:15:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.856454373479867) internal successors, (85621), 22202 states have internal predecessors, (85621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 85621 transitions. [2021-06-12 22:15:57,597 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 85621 transitions. Word has length 28 [2021-06-12 22:15:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:57,597 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 85621 transitions. [2021-06-12 22:15:57,597 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) [2021-06-12 22:15:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 85621 transitions. [2021-06-12 22:15:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:57,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:57,631 INFO L472 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] [2021-06-12 22:15:57,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:57,832 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-12 22:15:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:57,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203206721] [2021-06-12 22:15:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:57,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:57,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203206721] [2021-06-12 22:15:57,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203206721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:57,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487363266] [2021-06-12 22:15:57,868 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 [2021-06-12 22:15:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:15:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:58,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487363266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:58,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:58,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:15:58,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450950703] [2021-06-12 22:15:58,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:15:58,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:58,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:15:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:58,066 INFO L87 Difference]: Start difference. First operand 22203 states and 85621 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) [2021-06-12 22:15:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:58,730 INFO L93 Difference]: Finished difference Result 29255 states and 109041 transitions. [2021-06-12 22:15:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:15:58,731 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 [2021-06-12 22:15:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:58,805 INFO L225 Difference]: With dead ends: 29255 [2021-06-12 22:15:58,805 INFO L226 Difference]: Without dead ends: 29243 [2021-06-12 22:15:58,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:15:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29243 states. [2021-06-12 22:15:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29243 to 22351. [2021-06-12 22:15:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 22350 states have (on average 3.8510514541387026) internal successors, (86071), 22350 states have internal predecessors, (86071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 86071 transitions. [2021-06-12 22:15:59,361 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 86071 transitions. Word has length 28 [2021-06-12 22:15:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:59,361 INFO L482 AbstractCegarLoop]: Abstraction has 22351 states and 86071 transitions. [2021-06-12 22:15:59,361 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) [2021-06-12 22:15:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 86071 transitions. [2021-06-12 22:15:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:15:59,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:59,400 INFO L472 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] [2021-06-12 22:15:59,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:59,600 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-12 22:15:59,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:59,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416812686] [2021-06-12 22:15:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:59,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:59,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416812686] [2021-06-12 22:15:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416812686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:59,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050686418] [2021-06-12 22:15:59,627 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 [2021-06-12 22:15:59,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:15:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050686418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:59,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:59,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:15:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988480907] [2021-06-12 22:15:59,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:15:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:15:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:15:59,699 INFO L87 Difference]: Start difference. First operand 22351 states and 86071 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) [2021-06-12 22:15:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:59,946 INFO L93 Difference]: Finished difference Result 25610 states and 97028 transitions. [2021-06-12 22:15:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:15:59,947 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 [2021-06-12 22:15:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:00,008 INFO L225 Difference]: With dead ends: 25610 [2021-06-12 22:16:00,008 INFO L226 Difference]: Without dead ends: 25610 [2021-06-12 22:16:00,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:16:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25610 states. [2021-06-12 22:16:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25610 to 23154. [2021-06-12 22:16:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23154 states, 23153 states have (on average 3.8461538461538463) internal successors, (89050), 23153 states have internal predecessors, (89050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23154 states to 23154 states and 89050 transitions. [2021-06-12 22:16:00,584 INFO L78 Accepts]: Start accepts. Automaton has 23154 states and 89050 transitions. Word has length 28 [2021-06-12 22:16:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:00,584 INFO L482 AbstractCegarLoop]: Abstraction has 23154 states and 89050 transitions. [2021-06-12 22:16:00,584 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) [2021-06-12 22:16:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 23154 states and 89050 transitions. [2021-06-12 22:16:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:00,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:00,626 INFO L472 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] [2021-06-12 22:16:00,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:00,827 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-12 22:16:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:00,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928195399] [2021-06-12 22:16:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:00,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:00,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928195399] [2021-06-12 22:16:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928195399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965625562] [2021-06-12 22:16:00,867 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 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 [2021-06-12 22:16:00,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:16:00,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:00,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965625562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:00,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:00,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:16:00,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000569319] [2021-06-12 22:16:00,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:16:00,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:00,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:16:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:16:00,958 INFO L87 Difference]: Start difference. First operand 23154 states and 89050 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) [2021-06-12 22:16:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:01,717 INFO L93 Difference]: Finished difference Result 30991 states and 114399 transitions. [2021-06-12 22:16:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:16:01,717 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 [2021-06-12 22:16:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:01,787 INFO L225 Difference]: With dead ends: 30991 [2021-06-12 22:16:01,787 INFO L226 Difference]: Without dead ends: 30991 [2021-06-12 22:16:01,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:16:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30991 states. [2021-06-12 22:16:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30991 to 24366. [2021-06-12 22:16:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24366 states, 24365 states have (on average 3.8139134003693824) internal successors, (92926), 24365 states have internal predecessors, (92926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24366 states to 24366 states and 92926 transitions. [2021-06-12 22:16:02,312 INFO L78 Accepts]: Start accepts. Automaton has 24366 states and 92926 transitions. Word has length 28 [2021-06-12 22:16:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:02,312 INFO L482 AbstractCegarLoop]: Abstraction has 24366 states and 92926 transitions. [2021-06-12 22:16:02,312 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) [2021-06-12 22:16:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 24366 states and 92926 transitions. [2021-06-12 22:16:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:02,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:02,352 INFO L472 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] [2021-06-12 22:16:02,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:02,552 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-12 22:16:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:02,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409987066] [2021-06-12 22:16:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:02,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:02,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409987066] [2021-06-12 22:16:02,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409987066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:02,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112784469] [2021-06-12 22:16:02,584 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 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 [2021-06-12 22:16:02,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:02,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112784469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:02,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:02,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:16:02,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55109646] [2021-06-12 22:16:02,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:02,661 INFO L87 Difference]: Start difference. First operand 24366 states and 92926 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) [2021-06-12 22:16:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:03,214 INFO L93 Difference]: Finished difference Result 30092 states and 112016 transitions. [2021-06-12 22:16:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:16:03,215 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 [2021-06-12 22:16:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:03,288 INFO L225 Difference]: With dead ends: 30092 [2021-06-12 22:16:03,289 INFO L226 Difference]: Without dead ends: 30084 [2021-06-12 22:16:03,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:16:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30084 states. [2021-06-12 22:16:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30084 to 24188. [2021-06-12 22:16:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24188 states, 24187 states have (on average 3.820027287385786) internal successors, (92395), 24187 states have internal predecessors, (92395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24188 states to 24188 states and 92395 transitions. [2021-06-12 22:16:03,886 INFO L78 Accepts]: Start accepts. Automaton has 24188 states and 92395 transitions. Word has length 28 [2021-06-12 22:16:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:03,886 INFO L482 AbstractCegarLoop]: Abstraction has 24188 states and 92395 transitions. [2021-06-12 22:16:03,886 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) [2021-06-12 22:16:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 24188 states and 92395 transitions. [2021-06-12 22:16:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:03,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:03,925 INFO L472 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] [2021-06-12 22:16:04,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3987,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:04,125 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-12 22:16:04,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:04,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96434960] [2021-06-12 22:16:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:04,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:04,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96434960] [2021-06-12 22:16:04,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96434960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:04,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717234003] [2021-06-12 22:16:04,174 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 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 [2021-06-12 22:16:04,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717234003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:04,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:16:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071624817] [2021-06-12 22:16:04,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:04,261 INFO L87 Difference]: Start difference. First operand 24188 states and 92395 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) [2021-06-12 22:16:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:04,962 INFO L93 Difference]: Finished difference Result 31919 states and 117608 transitions. [2021-06-12 22:16:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:16:04,962 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 [2021-06-12 22:16:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:05,045 INFO L225 Difference]: With dead ends: 31919 [2021-06-12 22:16:05,046 INFO L226 Difference]: Without dead ends: 31919 [2021-06-12 22:16:05,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:16:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31919 states. [2021-06-12 22:16:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31919 to 25212. [2021-06-12 22:16:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 25211 states have (on average 3.796160406171909) internal successors, (95705), 25211 states have internal predecessors, (95705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 95705 transitions. [2021-06-12 22:16:05,631 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 95705 transitions. Word has length 28 [2021-06-12 22:16:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:05,631 INFO L482 AbstractCegarLoop]: Abstraction has 25212 states and 95705 transitions. [2021-06-12 22:16:05,631 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) [2021-06-12 22:16:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 95705 transitions. [2021-06-12 22:16:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:05,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:05,669 INFO L472 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] [2021-06-12 22:16:05,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:05,869 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-12 22:16:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976184135] [2021-06-12 22:16:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:05,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976184135] [2021-06-12 22:16:05,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976184135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777567471] [2021-06-12 22:16:05,907 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 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 [2021-06-12 22:16:05,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:16:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:16:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777567471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:05,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:16:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875449159] [2021-06-12 22:16:05,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:16:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:16:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:16:05,986 INFO L87 Difference]: Start difference. First operand 25212 states and 95705 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) [2021-06-12 22:16:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:06,472 INFO L93 Difference]: Finished difference Result 30875 states and 116320 transitions. [2021-06-12 22:16:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:16:06,472 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 [2021-06-12 22:16:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:06,541 INFO L225 Difference]: With dead ends: 30875 [2021-06-12 22:16:06,541 INFO L226 Difference]: Without dead ends: 30862 [2021-06-12 22:16:06,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30862 states. [2021-06-12 22:16:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30862 to 29308. [2021-06-12 22:16:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29308 states, 29307 states have (on average 3.8146517896748215) internal successors, (111796), 29307 states have internal predecessors, (111796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29308 states to 29308 states and 111796 transitions. [2021-06-12 22:16:07,152 INFO L78 Accepts]: Start accepts. Automaton has 29308 states and 111796 transitions. Word has length 28 [2021-06-12 22:16:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:07,152 INFO L482 AbstractCegarLoop]: Abstraction has 29308 states and 111796 transitions. [2021-06-12 22:16:07,152 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) [2021-06-12 22:16:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 29308 states and 111796 transitions. [2021-06-12 22:16:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:07,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:07,203 INFO L472 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] [2021-06-12 22:16:07,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3989,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:07,403 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-12 22:16:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:07,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795944310] [2021-06-12 22:16:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:07,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:07,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795944310] [2021-06-12 22:16:07,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795944310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148338268] [2021-06-12 22:16:07,444 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 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 [2021-06-12 22:16:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:16:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148338268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:07,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:07,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:16:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955038500] [2021-06-12 22:16:07,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:16:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:16:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:16:07,517 INFO L87 Difference]: Start difference. First operand 29308 states and 111796 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) [2021-06-12 22:16:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:07,857 INFO L93 Difference]: Finished difference Result 32311 states and 121127 transitions. [2021-06-12 22:16:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:16:07,857 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 [2021-06-12 22:16:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:07,927 INFO L225 Difference]: With dead ends: 32311 [2021-06-12 22:16:07,927 INFO L226 Difference]: Without dead ends: 32311 [2021-06-12 22:16:07,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32311 states. [2021-06-12 22:16:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32311 to 29053. [2021-06-12 22:16:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29053 states, 29052 states have (on average 3.81099407958144) internal successors, (110717), 29052 states have internal predecessors, (110717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29053 states to 29053 states and 110717 transitions. [2021-06-12 22:16:08,556 INFO L78 Accepts]: Start accepts. Automaton has 29053 states and 110717 transitions. Word has length 28 [2021-06-12 22:16:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:08,556 INFO L482 AbstractCegarLoop]: Abstraction has 29053 states and 110717 transitions. [2021-06-12 22:16:08,556 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) [2021-06-12 22:16:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29053 states and 110717 transitions. [2021-06-12 22:16:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:08,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:08,793 INFO L472 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] [2021-06-12 22:16:08,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-12 22:16:08,993 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-12 22:16:08,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:08,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578600485] [2021-06-12 22:16:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:09,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:09,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578600485] [2021-06-12 22:16:09,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578600485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:09,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988390175] [2021-06-12 22:16:09,024 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 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 [2021-06-12 22:16:09,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988390175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:09,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:09,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:16:09,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171543372] [2021-06-12 22:16:09,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:09,220 INFO L87 Difference]: Start difference. First operand 29053 states and 110717 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) [2021-06-12 22:16:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:09,812 INFO L93 Difference]: Finished difference Result 35470 states and 132021 transitions. [2021-06-12 22:16:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:16:09,812 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 [2021-06-12 22:16:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:09,894 INFO L225 Difference]: With dead ends: 35470 [2021-06-12 22:16:09,894 INFO L226 Difference]: Without dead ends: 35462 [2021-06-12 22:16:09,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:16:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35462 states. [2021-06-12 22:16:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35462 to 29019. [2021-06-12 22:16:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29019 states, 29018 states have (on average 3.8114273898959268) internal successors, (110600), 29018 states have internal predecessors, (110600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29019 states to 29019 states and 110600 transitions. [2021-06-12 22:16:10,715 INFO L78 Accepts]: Start accepts. Automaton has 29019 states and 110600 transitions. Word has length 28 [2021-06-12 22:16:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:10,715 INFO L482 AbstractCegarLoop]: Abstraction has 29019 states and 110600 transitions. [2021-06-12 22:16:10,715 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) [2021-06-12 22:16:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29019 states and 110600 transitions. [2021-06-12 22:16:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:10,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:10,770 INFO L472 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] [2021-06-12 22:16:10,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-12 22:16:10,971 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-12 22:16:10,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:10,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832992111] [2021-06-12 22:16:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832992111] [2021-06-12 22:16:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832992111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377926441] [2021-06-12 22:16:11,003 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 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 [2021-06-12 22:16:11,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:16:11,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:16:11,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:11,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377926441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:11,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:16:11,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433048289] [2021-06-12 22:16:11,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:16:11,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:11,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:16:11,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:16:11,078 INFO L87 Difference]: Start difference. First operand 29019 states and 110600 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) [2021-06-12 22:16:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:11,742 INFO L93 Difference]: Finished difference Result 31865 states and 120062 transitions. [2021-06-12 22:16:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:11,742 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 [2021-06-12 22:16:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:11,820 INFO L225 Difference]: With dead ends: 31865 [2021-06-12 22:16:11,820 INFO L226 Difference]: Without dead ends: 31865 [2021-06-12 22:16:11,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:16:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31865 states. [2021-06-12 22:16:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31865 to 29551. [2021-06-12 22:16:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29551 states, 29550 states have (on average 3.8099492385786804) internal successors, (112584), 29550 states have internal predecessors, (112584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29551 states to 29551 states and 112584 transitions. [2021-06-12 22:16:12,476 INFO L78 Accepts]: Start accepts. Automaton has 29551 states and 112584 transitions. Word has length 28 [2021-06-12 22:16:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:12,477 INFO L482 AbstractCegarLoop]: Abstraction has 29551 states and 112584 transitions. [2021-06-12 22:16:12,477 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) [2021-06-12 22:16:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 29551 states and 112584 transitions. [2021-06-12 22:16:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:12,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:12,534 INFO L472 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] [2021-06-12 22:16:12,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:12,742 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:12,742 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-12 22:16:12,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:12,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065672757] [2021-06-12 22:16:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:12,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065672757] [2021-06-12 22:16:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065672757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726358661] [2021-06-12 22:16:12,916 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 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 [2021-06-12 22:16:12,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726358661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:13,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:16:13,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878428770] [2021-06-12 22:16:13,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:13,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:13,018 INFO L87 Difference]: Start difference. First operand 29551 states and 112584 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) [2021-06-12 22:16:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:13,681 INFO L93 Difference]: Finished difference Result 36395 states and 135424 transitions. [2021-06-12 22:16:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:16:13,682 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 [2021-06-12 22:16:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:13,768 INFO L225 Difference]: With dead ends: 36395 [2021-06-12 22:16:13,768 INFO L226 Difference]: Without dead ends: 36371 [2021-06-12 22:16:13,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:16:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36371 states. [2021-06-12 22:16:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36371 to 29723. [2021-06-12 22:16:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29723 states, 29722 states have (on average 3.8058677074221117) internal successors, (113118), 29722 states have internal predecessors, (113118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29723 states to 29723 states and 113118 transitions. [2021-06-12 22:16:14,641 INFO L78 Accepts]: Start accepts. Automaton has 29723 states and 113118 transitions. Word has length 28 [2021-06-12 22:16:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:14,641 INFO L482 AbstractCegarLoop]: Abstraction has 29723 states and 113118 transitions. [2021-06-12 22:16:14,641 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) [2021-06-12 22:16:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29723 states and 113118 transitions. [2021-06-12 22:16:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:14,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:14,692 INFO L472 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] [2021-06-12 22:16:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:14,893 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-12 22:16:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849881388] [2021-06-12 22:16:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:14,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849881388] [2021-06-12 22:16:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849881388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859954753] [2021-06-12 22:16:14,929 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 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 [2021-06-12 22:16:14,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:16:14,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:16:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859954753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 22:16:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826193155] [2021-06-12 22:16:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:15,000 INFO L87 Difference]: Start difference. First operand 29723 states and 113118 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) [2021-06-12 22:16:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:15,566 INFO L93 Difference]: Finished difference Result 32279 states and 121530 transitions. [2021-06-12 22:16:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:16:15,575 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 [2021-06-12 22:16:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:15,648 INFO L225 Difference]: With dead ends: 32279 [2021-06-12 22:16:15,648 INFO L226 Difference]: Without dead ends: 32279 [2021-06-12 22:16:15,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:16:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32279 states. [2021-06-12 22:16:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32279 to 29649. [2021-06-12 22:16:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29649 states, 29648 states have (on average 3.8067323259579062) internal successors, (112862), 29648 states have internal predecessors, (112862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29649 states to 29649 states and 112862 transitions. [2021-06-12 22:16:16,298 INFO L78 Accepts]: Start accepts. Automaton has 29649 states and 112862 transitions. Word has length 28 [2021-06-12 22:16:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:16,298 INFO L482 AbstractCegarLoop]: Abstraction has 29649 states and 112862 transitions. [2021-06-12 22:16:16,298 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) [2021-06-12 22:16:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 29649 states and 112862 transitions. [2021-06-12 22:16:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:16,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:16,354 INFO L472 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] [2021-06-12 22:16:16,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:16,554 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:16,554 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-12 22:16:16,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:16,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459571781] [2021-06-12 22:16:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:16,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:16,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459571781] [2021-06-12 22:16:16,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459571781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:16,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540590311] [2021-06-12 22:16:16,607 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 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 [2021-06-12 22:16:16,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:16,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540590311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:16,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:16,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:16:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024742032] [2021-06-12 22:16:16,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:16:16,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:16,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:16:16,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:16:16,689 INFO L87 Difference]: Start difference. First operand 29649 states and 112862 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) [2021-06-12 22:16:17,307 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 22:16:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:17,536 INFO L93 Difference]: Finished difference Result 36318 states and 135165 transitions. [2021-06-12 22:16:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:16:17,537 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 [2021-06-12 22:16:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:17,632 INFO L225 Difference]: With dead ends: 36318 [2021-06-12 22:16:17,632 INFO L226 Difference]: Without dead ends: 36278 [2021-06-12 22:16:17,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:16:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36278 states. [2021-06-12 22:16:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36278 to 29805. [2021-06-12 22:16:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29805 states, 29804 states have (on average 3.80284525567038) internal successors, (113340), 29804 states have internal predecessors, (113340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29805 states to 29805 states and 113340 transitions. [2021-06-12 22:16:18,448 INFO L78 Accepts]: Start accepts. Automaton has 29805 states and 113340 transitions. Word has length 28 [2021-06-12 22:16:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:18,448 INFO L482 AbstractCegarLoop]: Abstraction has 29805 states and 113340 transitions. [2021-06-12 22:16:18,448 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) [2021-06-12 22:16:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 29805 states and 113340 transitions. [2021-06-12 22:16:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:18,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:18,504 INFO L472 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] [2021-06-12 22:16:18,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:18,705 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-12 22:16:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:18,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231451733] [2021-06-12 22:16:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:18,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:18,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231451733] [2021-06-12 22:16:18,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231451733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:18,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387463707] [2021-06-12 22:16:18,736 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 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 [2021-06-12 22:16:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:18,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:18,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387463707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:18,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:18,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156781291] [2021-06-12 22:16:18,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:18,855 INFO L87 Difference]: Start difference. First operand 29805 states and 113340 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) [2021-06-12 22:16:19,410 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 22:16:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:20,274 INFO L93 Difference]: Finished difference Result 68211 states and 251076 transitions. [2021-06-12 22:16:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:16:20,275 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 [2021-06-12 22:16:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:20,463 INFO L225 Difference]: With dead ends: 68211 [2021-06-12 22:16:20,463 INFO L226 Difference]: Without dead ends: 68211 [2021-06-12 22:16:20,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:16:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68211 states. [2021-06-12 22:16:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68211 to 37529. [2021-06-12 22:16:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37528 states have (on average 3.8846727776593477) internal successors, (145784), 37528 states have internal predecessors, (145784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 145784 transitions. [2021-06-12 22:16:21,907 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 145784 transitions. Word has length 28 [2021-06-12 22:16:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:21,907 INFO L482 AbstractCegarLoop]: Abstraction has 37529 states and 145784 transitions. [2021-06-12 22:16:21,908 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) [2021-06-12 22:16:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 145784 transitions. [2021-06-12 22:16:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:21,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:21,975 INFO L472 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] [2021-06-12 22:16:22,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:22,189 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-12 22:16:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219191371] [2021-06-12 22:16:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:22,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219191371] [2021-06-12 22:16:22,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219191371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490590020] [2021-06-12 22:16:22,224 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 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 [2021-06-12 22:16:22,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490590020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:22,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:22,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:22,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236745212] [2021-06-12 22:16:22,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:22,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:22,356 INFO L87 Difference]: Start difference. First operand 37529 states and 145784 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) [2021-06-12 22:16:22,527 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 22:16:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:23,859 INFO L93 Difference]: Finished difference Result 67584 states and 249415 transitions. [2021-06-12 22:16:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:16:23,860 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 [2021-06-12 22:16:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:24,041 INFO L225 Difference]: With dead ends: 67584 [2021-06-12 22:16:24,042 INFO L226 Difference]: Without dead ends: 67584 [2021-06-12 22:16:24,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 888.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:16:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67584 states. [2021-06-12 22:16:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67584 to 37526. [2021-06-12 22:16:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37526 states, 37525 states have (on average 3.884610259826782) internal successors, (145770), 37525 states have internal predecessors, (145770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37526 states to 37526 states and 145770 transitions. [2021-06-12 22:16:25,541 INFO L78 Accepts]: Start accepts. Automaton has 37526 states and 145770 transitions. Word has length 28 [2021-06-12 22:16:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 37526 states and 145770 transitions. [2021-06-12 22:16:25,541 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) [2021-06-12 22:16:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 37526 states and 145770 transitions. [2021-06-12 22:16:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:25,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:25,603 INFO L472 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] [2021-06-12 22:16:25,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:25,804 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-12 22:16:25,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:25,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432839270] [2021-06-12 22:16:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:25,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:25,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432839270] [2021-06-12 22:16:25,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432839270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:25,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372835609] [2021-06-12 22:16:25,835 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 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 [2021-06-12 22:16:25,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:16:25,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:25,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372835609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:25,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:25,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:16:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96008989] [2021-06-12 22:16:25,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:25,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:25,946 INFO L87 Difference]: Start difference. First operand 37526 states and 145770 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) [2021-06-12 22:16:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:27,198 INFO L93 Difference]: Finished difference Result 62987 states and 233868 transitions. [2021-06-12 22:16:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:16:27,198 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 [2021-06-12 22:16:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:27,364 INFO L225 Difference]: With dead ends: 62987 [2021-06-12 22:16:27,365 INFO L226 Difference]: Without dead ends: 62987 [2021-06-12 22:16:27,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:16:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2021-06-12 22:16:28,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 37548. [2021-06-12 22:16:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8849175699789598) internal successors, (145867), 37547 states have internal predecessors, (145867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145867 transitions. [2021-06-12 22:16:28,911 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145867 transitions. Word has length 28 [2021-06-12 22:16:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:28,911 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145867 transitions. [2021-06-12 22:16:28,911 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) [2021-06-12 22:16:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145867 transitions. [2021-06-12 22:16:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:28,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:28,978 INFO L472 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] [2021-06-12 22:16:29,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:29,178 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:29,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-12 22:16:29,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:29,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909711849] [2021-06-12 22:16:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:29,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909711849] [2021-06-12 22:16:29,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909711849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243868567] [2021-06-12 22:16:29,208 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 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 [2021-06-12 22:16:29,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:29,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243868567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:29,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:29,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:16:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030610407] [2021-06-12 22:16:29,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:29,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:29,313 INFO L87 Difference]: Start difference. First operand 37548 states and 145867 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) [2021-06-12 22:16:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:30,461 INFO L93 Difference]: Finished difference Result 62120 states and 231628 transitions. [2021-06-12 22:16:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:16:30,461 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 [2021-06-12 22:16:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:30,623 INFO L225 Difference]: With dead ends: 62120 [2021-06-12 22:16:30,623 INFO L226 Difference]: Without dead ends: 62112 [2021-06-12 22:16:30,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:16:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62112 states. [2021-06-12 22:16:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62112 to 37548. [2021-06-12 22:16:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8847577702612726) internal successors, (145861), 37547 states have internal predecessors, (145861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145861 transitions. [2021-06-12 22:16:32,107 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145861 transitions. Word has length 28 [2021-06-12 22:16:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:32,107 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145861 transitions. [2021-06-12 22:16:32,107 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) [2021-06-12 22:16:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145861 transitions. [2021-06-12 22:16:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:32,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:32,170 INFO L472 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] [2021-06-12 22:16:32,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-12 22:16:32,370 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-12 22:16:32,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:32,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480683746] [2021-06-12 22:16:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:32,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:32,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480683746] [2021-06-12 22:16:32,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480683746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:32,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726014997] [2021-06-12 22:16:32,400 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 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 [2021-06-12 22:16:32,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:32,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726014997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:32,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:32,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:32,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483437271] [2021-06-12 22:16:32,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:32,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:32,518 INFO L87 Difference]: Start difference. First operand 37548 states and 145861 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) [2021-06-12 22:16:33,246 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 22:16:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:33,718 INFO L93 Difference]: Finished difference Result 61801 states and 230767 transitions. [2021-06-12 22:16:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:16:33,719 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 [2021-06-12 22:16:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:33,887 INFO L225 Difference]: With dead ends: 61801 [2021-06-12 22:16:33,888 INFO L226 Difference]: Without dead ends: 61801 [2021-06-12 22:16:33,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:16:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61801 states. [2021-06-12 22:16:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61801 to 37556. [2021-06-12 22:16:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884835574490747) internal successors, (145895), 37555 states have internal predecessors, (145895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145895 transitions. [2021-06-12 22:16:35,257 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145895 transitions. Word has length 28 [2021-06-12 22:16:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:35,257 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145895 transitions. [2021-06-12 22:16:35,257 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) [2021-06-12 22:16:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145895 transitions. [2021-06-12 22:16:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:35,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:35,318 INFO L472 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] [2021-06-12 22:16:35,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-12 22:16:35,519 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-12 22:16:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321958335] [2021-06-12 22:16:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:35,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321958335] [2021-06-12 22:16:35,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321958335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:35,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803917531] [2021-06-12 22:16:35,551 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 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 [2021-06-12 22:16:35,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:16:35,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803917531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:35,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:35,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:35,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123418653] [2021-06-12 22:16:35,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:35,679 INFO L87 Difference]: Start difference. First operand 37556 states and 145895 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) [2021-06-12 22:16:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:36,970 INFO L93 Difference]: Finished difference Result 61590 states and 230241 transitions. [2021-06-12 22:16:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:16:36,971 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 [2021-06-12 22:16:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:37,140 INFO L225 Difference]: With dead ends: 61590 [2021-06-12 22:16:37,140 INFO L226 Difference]: Without dead ends: 61582 [2021-06-12 22:16:37,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:16:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61582 states. [2021-06-12 22:16:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61582 to 37556. [2021-06-12 22:16:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884782319265078) internal successors, (145893), 37555 states have internal predecessors, (145893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145893 transitions. [2021-06-12 22:16:38,438 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145893 transitions. Word has length 28 [2021-06-12 22:16:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:38,438 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145893 transitions. [2021-06-12 22:16:38,438 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) [2021-06-12 22:16:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145893 transitions. [2021-06-12 22:16:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:38,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:38,506 INFO L472 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] [2021-06-12 22:16:38,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-12 22:16:38,706 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-12 22:16:38,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:38,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173543918] [2021-06-12 22:16:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:38,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173543918] [2021-06-12 22:16:38,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173543918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181072346] [2021-06-12 22:16:38,737 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 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 [2021-06-12 22:16:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:38,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181072346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:38,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:38,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:16:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632348828] [2021-06-12 22:16:38,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:16:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:16:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:16:38,845 INFO L87 Difference]: Start difference. First operand 37556 states and 145893 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) [2021-06-12 22:16:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:40,118 INFO L93 Difference]: Finished difference Result 60972 states and 226630 transitions. [2021-06-12 22:16:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:16:40,118 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 [2021-06-12 22:16:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:40,468 INFO L225 Difference]: With dead ends: 60972 [2021-06-12 22:16:40,469 INFO L226 Difference]: Without dead ends: 60972 [2021-06-12 22:16:40,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:16:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60972 states. [2021-06-12 22:16:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60972 to 40355. [2021-06-12 22:16:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40355 states, 40354 states have (on average 3.8889081627595776) internal successors, (156933), 40354 states have internal predecessors, (156933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40355 states to 40355 states and 156933 transitions. [2021-06-12 22:16:41,812 INFO L78 Accepts]: Start accepts. Automaton has 40355 states and 156933 transitions. Word has length 28 [2021-06-12 22:16:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:41,812 INFO L482 AbstractCegarLoop]: Abstraction has 40355 states and 156933 transitions. [2021-06-12 22:16:41,812 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) [2021-06-12 22:16:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40355 states and 156933 transitions. [2021-06-12 22:16:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:41,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:41,887 INFO L472 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] [2021-06-12 22:16:42,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-12 22:16:42,087 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-12 22:16:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:42,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561539748] [2021-06-12 22:16:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:42,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:42,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561539748] [2021-06-12 22:16:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561539748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:42,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294354796] [2021-06-12 22:16:42,118 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 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 [2021-06-12 22:16:42,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:42,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:42,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:42,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:42,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294354796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:42,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:42,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:16:42,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19050043] [2021-06-12 22:16:42,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:16:42,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:42,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:16:42,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:16:42,212 INFO L87 Difference]: Start difference. First operand 40355 states and 156933 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) [2021-06-12 22:16:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:43,325 INFO L93 Difference]: Finished difference Result 60488 states and 225357 transitions. [2021-06-12 22:16:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:16:43,326 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 [2021-06-12 22:16:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:43,490 INFO L225 Difference]: With dead ends: 60488 [2021-06-12 22:16:43,490 INFO L226 Difference]: Without dead ends: 60480 [2021-06-12 22:16:43,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:16:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60480 states. [2021-06-12 22:16:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60480 to 40081. [2021-06-12 22:16:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40081 states, 40080 states have (on average 3.8941616766467066) internal successors, (156078), 40080 states have internal predecessors, (156078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40081 states to 40081 states and 156078 transitions. [2021-06-12 22:16:44,869 INFO L78 Accepts]: Start accepts. Automaton has 40081 states and 156078 transitions. Word has length 28 [2021-06-12 22:16:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:44,869 INFO L482 AbstractCegarLoop]: Abstraction has 40081 states and 156078 transitions. [2021-06-12 22:16:44,869 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) [2021-06-12 22:16:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 40081 states and 156078 transitions. [2021-06-12 22:16:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:44,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:44,931 INFO L472 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] [2021-06-12 22:16:45,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:45,131 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-12 22:16:45,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:45,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339499194] [2021-06-12 22:16:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:45,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339499194] [2021-06-12 22:16:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339499194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475881293] [2021-06-12 22:16:45,173 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 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 [2021-06-12 22:16:45,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:16:45,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:45,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:45,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475881293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:45,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:45,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:16:45,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099998286] [2021-06-12 22:16:45,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:16:45,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:45,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:16:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:16:45,271 INFO L87 Difference]: Start difference. First operand 40081 states and 156078 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) [2021-06-12 22:16:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:46,275 INFO L93 Difference]: Finished difference Result 59033 states and 221360 transitions. [2021-06-12 22:16:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:16:46,275 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 [2021-06-12 22:16:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:46,438 INFO L225 Difference]: With dead ends: 59033 [2021-06-12 22:16:46,438 INFO L226 Difference]: Without dead ends: 59009 [2021-06-12 22:16:46,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:16:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-06-12 22:16:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 39991. [2021-06-12 22:16:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39991 states, 39990 states have (on average 3.893998499624906) internal successors, (155721), 39990 states have internal predecessors, (155721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39991 states to 39991 states and 155721 transitions. [2021-06-12 22:16:48,041 INFO L78 Accepts]: Start accepts. Automaton has 39991 states and 155721 transitions. Word has length 28 [2021-06-12 22:16:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:48,042 INFO L482 AbstractCegarLoop]: Abstraction has 39991 states and 155721 transitions. [2021-06-12 22:16:48,042 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) [2021-06-12 22:16:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39991 states and 155721 transitions. [2021-06-12 22:16:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:48,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:48,122 INFO L472 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] [2021-06-12 22:16:48,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:48,323 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-12 22:16:48,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:48,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350653927] [2021-06-12 22:16:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:48,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350653927] [2021-06-12 22:16:48,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350653927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450721627] [2021-06-12 22:16:48,359 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 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 [2021-06-12 22:16:48,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:48,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450721627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:48,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:48,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:48,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499003088] [2021-06-12 22:16:48,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:48,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:48,487 INFO L87 Difference]: Start difference. First operand 39991 states and 155721 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) [2021-06-12 22:16:49,124 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 22:16:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:49,740 INFO L93 Difference]: Finished difference Result 60273 states and 224760 transitions. [2021-06-12 22:16:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:16:49,741 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 [2021-06-12 22:16:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:49,903 INFO L225 Difference]: With dead ends: 60273 [2021-06-12 22:16:49,903 INFO L226 Difference]: Without dead ends: 60273 [2021-06-12 22:16:49,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 714.7ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:16:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60273 states. [2021-06-12 22:16:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60273 to 40087. [2021-06-12 22:16:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40087 states, 40086 states have (on average 3.892506111859502) internal successors, (156035), 40086 states have internal predecessors, (156035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 156035 transitions. [2021-06-12 22:16:51,191 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 156035 transitions. Word has length 28 [2021-06-12 22:16:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:51,191 INFO L482 AbstractCegarLoop]: Abstraction has 40087 states and 156035 transitions. [2021-06-12 22:16:51,191 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) [2021-06-12 22:16:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 156035 transitions. [2021-06-12 22:16:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:51,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:51,419 INFO L472 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] [2021-06-12 22:16:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:51,633 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-12 22:16:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805378807] [2021-06-12 22:16:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:51,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805378807] [2021-06-12 22:16:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805378807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808567843] [2021-06-12 22:16:51,670 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 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 [2021-06-12 22:16:51,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808567843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:51,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:51,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787737465] [2021-06-12 22:16:51,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:51,802 INFO L87 Difference]: Start difference. First operand 40087 states and 156035 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) [2021-06-12 22:16:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:52,974 INFO L93 Difference]: Finished difference Result 59960 states and 223872 transitions. [2021-06-12 22:16:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:16:52,974 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 [2021-06-12 22:16:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:53,142 INFO L225 Difference]: With dead ends: 59960 [2021-06-12 22:16:53,142 INFO L226 Difference]: Without dead ends: 59952 [2021-06-12 22:16:53,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 494.5ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:16:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59952 states. [2021-06-12 22:16:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59952 to 40019. [2021-06-12 22:16:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40019 states, 40018 states have (on average 3.893822779749113) internal successors, (155823), 40018 states have internal predecessors, (155823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40019 states to 40019 states and 155823 transitions. [2021-06-12 22:16:54,381 INFO L78 Accepts]: Start accepts. Automaton has 40019 states and 155823 transitions. Word has length 28 [2021-06-12 22:16:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:54,381 INFO L482 AbstractCegarLoop]: Abstraction has 40019 states and 155823 transitions. [2021-06-12 22:16:54,381 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) [2021-06-12 22:16:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40019 states and 155823 transitions. [2021-06-12 22:16:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:54,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:54,446 INFO L472 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] [2021-06-12 22:16:54,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4006,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:54,646 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-12 22:16:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:54,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091322966] [2021-06-12 22:16:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:54,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091322966] [2021-06-12 22:16:54,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091322966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652822230] [2021-06-12 22:16:54,683 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 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 [2021-06-12 22:16:54,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:54,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652822230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:54,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:54,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:16:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14493753] [2021-06-12 22:16:54,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:54,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:54,790 INFO L87 Difference]: Start difference. First operand 40019 states and 155823 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) [2021-06-12 22:16:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:55,788 INFO L93 Difference]: Finished difference Result 58691 states and 220361 transitions. [2021-06-12 22:16:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:16:55,789 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 [2021-06-12 22:16:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:56,132 INFO L225 Difference]: With dead ends: 58691 [2021-06-12 22:16:56,132 INFO L226 Difference]: Without dead ends: 58667 [2021-06-12 22:16:56,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:16:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58667 states. [2021-06-12 22:16:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58667 to 39995. [2021-06-12 22:16:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39995 states, 39994 states have (on average 3.89395909386408) internal successors, (155735), 39994 states have internal predecessors, (155735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39995 states to 39995 states and 155735 transitions. [2021-06-12 22:16:57,348 INFO L78 Accepts]: Start accepts. Automaton has 39995 states and 155735 transitions. Word has length 28 [2021-06-12 22:16:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:57,348 INFO L482 AbstractCegarLoop]: Abstraction has 39995 states and 155735 transitions. [2021-06-12 22:16:57,348 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) [2021-06-12 22:16:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39995 states and 155735 transitions. [2021-06-12 22:16:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:16:57,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:57,415 INFO L472 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] [2021-06-12 22:16:57,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4007 [2021-06-12 22:16:57,615 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-12 22:16:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:57,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333397284] [2021-06-12 22:16:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:57,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333397284] [2021-06-12 22:16:57,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333397284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453286414] [2021-06-12 22:16:57,653 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 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 [2021-06-12 22:16:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:57,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:16:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:57,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453286414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:57,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:57,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:16:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392784726] [2021-06-12 22:16:57,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:16:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:16:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:16:57,748 INFO L87 Difference]: Start difference. First operand 39995 states and 155735 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) [2021-06-12 22:16:58,483 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 22:16:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:59,388 INFO L93 Difference]: Finished difference Result 61857 states and 229366 transitions. [2021-06-12 22:16:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:16:59,389 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 [2021-06-12 22:16:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:59,697 INFO L225 Difference]: With dead ends: 61857 [2021-06-12 22:16:59,697 INFO L226 Difference]: Without dead ends: 61857 [2021-06-12 22:16:59,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 984.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:16:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61857 states. [2021-06-12 22:17:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61857 to 44335. [2021-06-12 22:17:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8442053502954843) internal successors, (170429), 44334 states have internal predecessors, (170429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170429 transitions. [2021-06-12 22:17:00,997 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170429 transitions. Word has length 28 [2021-06-12 22:17:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:00,997 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170429 transitions. [2021-06-12 22:17:00,997 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) [2021-06-12 22:17:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170429 transitions. [2021-06-12 22:17:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:01,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:01,068 INFO L472 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] [2021-06-12 22:17:01,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:01,269 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-12 22:17:01,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:01,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928548794] [2021-06-12 22:17:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:01,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:01,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928548794] [2021-06-12 22:17:01,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928548794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497043614] [2021-06-12 22:17:01,307 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 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 [2021-06-12 22:17:01,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:01,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:01,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:01,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497043614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:01,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:17:01,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950263612] [2021-06-12 22:17:01,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:01,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:01,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:01,393 INFO L87 Difference]: Start difference. First operand 44335 states and 170429 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) [2021-06-12 22:17:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:02,764 INFO L93 Difference]: Finished difference Result 61088 states and 227260 transitions. [2021-06-12 22:17:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:17:02,765 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 [2021-06-12 22:17:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:02,928 INFO L225 Difference]: With dead ends: 61088 [2021-06-12 22:17:02,928 INFO L226 Difference]: Without dead ends: 61080 [2021-06-12 22:17:02,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:17:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61080 states. [2021-06-12 22:17:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61080 to 43223. [2021-06-12 22:17:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43223 states, 43222 states have (on average 3.862963305723937) internal successors, (166965), 43222 states have internal predecessors, (166965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43223 states to 43223 states and 166965 transitions. [2021-06-12 22:17:04,283 INFO L78 Accepts]: Start accepts. Automaton has 43223 states and 166965 transitions. Word has length 28 [2021-06-12 22:17:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:04,283 INFO L482 AbstractCegarLoop]: Abstraction has 43223 states and 166965 transitions. [2021-06-12 22:17:04,283 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) [2021-06-12 22:17:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 43223 states and 166965 transitions. [2021-06-12 22:17:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:04,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:04,526 INFO L472 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] [2021-06-12 22:17:04,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4009 [2021-06-12 22:17:04,741 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:04,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-12 22:17:04,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:04,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609853739] [2021-06-12 22:17:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:04,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609853739] [2021-06-12 22:17:04,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609853739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360474495] [2021-06-12 22:17:04,777 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 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 [2021-06-12 22:17:04,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:17:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360474495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:04,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:17:04,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851722343] [2021-06-12 22:17:04,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:04,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:04,864 INFO L87 Difference]: Start difference. First operand 43223 states and 166965 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) [2021-06-12 22:17:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:06,118 INFO L93 Difference]: Finished difference Result 59466 states and 222744 transitions. [2021-06-12 22:17:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:17:06,118 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 [2021-06-12 22:17:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:06,301 INFO L225 Difference]: With dead ends: 59466 [2021-06-12 22:17:06,302 INFO L226 Difference]: Without dead ends: 59442 [2021-06-12 22:17:06,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:17:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59442 states. [2021-06-12 22:17:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59442 to 43235. [2021-06-12 22:17:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43235 states, 43234 states have (on average 3.860827126798353) internal successors, (166919), 43234 states have internal predecessors, (166919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43235 states to 43235 states and 166919 transitions. [2021-06-12 22:17:07,575 INFO L78 Accepts]: Start accepts. Automaton has 43235 states and 166919 transitions. Word has length 28 [2021-06-12 22:17:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:07,575 INFO L482 AbstractCegarLoop]: Abstraction has 43235 states and 166919 transitions. [2021-06-12 22:17:07,575 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) [2021-06-12 22:17:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 43235 states and 166919 transitions. [2021-06-12 22:17:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:07,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:07,648 INFO L472 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] [2021-06-12 22:17:07,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-12 22:17:07,848 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-12 22:17:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321626080] [2021-06-12 22:17:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:07,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321626080] [2021-06-12 22:17:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321626080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948063088] [2021-06-12 22:17:07,885 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 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 [2021-06-12 22:17:07,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:07,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:07,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948063088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:07,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:07,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:17:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210663690] [2021-06-12 22:17:07,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:07,971 INFO L87 Difference]: Start difference. First operand 43235 states and 166919 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) [2021-06-12 22:17:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:09,174 INFO L93 Difference]: Finished difference Result 60717 states and 226269 transitions. [2021-06-12 22:17:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:17:09,174 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 [2021-06-12 22:17:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:09,534 INFO L225 Difference]: With dead ends: 60717 [2021-06-12 22:17:09,534 INFO L226 Difference]: Without dead ends: 60677 [2021-06-12 22:17:09,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60677 states. [2021-06-12 22:17:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60677 to 43367. [2021-06-12 22:17:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43367 states, 43366 states have (on average 3.860143891527925) internal successors, (167399), 43366 states have internal predecessors, (167399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 167399 transitions. [2021-06-12 22:17:10,800 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 167399 transitions. Word has length 28 [2021-06-12 22:17:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:10,800 INFO L482 AbstractCegarLoop]: Abstraction has 43367 states and 167399 transitions. [2021-06-12 22:17:10,800 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) [2021-06-12 22:17:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 167399 transitions. [2021-06-12 22:17:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:10,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:10,878 INFO L472 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] [2021-06-12 22:17:11,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4011,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:11,079 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-12 22:17:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:11,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903708822] [2021-06-12 22:17:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:11,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903708822] [2021-06-12 22:17:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903708822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913452613] [2021-06-12 22:17:11,116 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 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 [2021-06-12 22:17:11,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:17:11,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:11,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:11,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913452613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:11,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:11,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:17:11,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022107017] [2021-06-12 22:17:11,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:11,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:11,238 INFO L87 Difference]: Start difference. First operand 43367 states and 167399 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) [2021-06-12 22:17:12,004 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 22:17:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:12,788 INFO L93 Difference]: Finished difference Result 59965 states and 224001 transitions. [2021-06-12 22:17:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:17:12,789 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 [2021-06-12 22:17:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:12,949 INFO L225 Difference]: With dead ends: 59965 [2021-06-12 22:17:12,949 INFO L226 Difference]: Without dead ends: 59965 [2021-06-12 22:17:12,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 942.7ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:17:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2021-06-12 22:17:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 44272. [2021-06-12 22:17:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44272 states, 44271 states have (on average 3.8506019742043325) internal successors, (170470), 44271 states have internal predecessors, (170470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44272 states to 44272 states and 170470 transitions. [2021-06-12 22:17:14,380 INFO L78 Accepts]: Start accepts. Automaton has 44272 states and 170470 transitions. Word has length 28 [2021-06-12 22:17:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:14,380 INFO L482 AbstractCegarLoop]: Abstraction has 44272 states and 170470 transitions. [2021-06-12 22:17:14,380 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) [2021-06-12 22:17:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44272 states and 170470 transitions. [2021-06-12 22:17:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:14,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:14,450 INFO L472 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] [2021-06-12 22:17:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-12 22:17:14,657 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-12 22:17:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939229109] [2021-06-12 22:17:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939229109] [2021-06-12 22:17:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939229109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615062172] [2021-06-12 22:17:14,698 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 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 [2021-06-12 22:17:14,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:17:14,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615062172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:14,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:17:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604232563] [2021-06-12 22:17:14,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:14,816 INFO L87 Difference]: Start difference. First operand 44272 states and 170470 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) [2021-06-12 22:17:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:16,197 INFO L93 Difference]: Finished difference Result 59467 states and 222606 transitions. [2021-06-12 22:17:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:17:16,197 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 [2021-06-12 22:17:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:16,358 INFO L225 Difference]: With dead ends: 59467 [2021-06-12 22:17:16,359 INFO L226 Difference]: Without dead ends: 59459 [2021-06-12 22:17:16,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:17:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59459 states. [2021-06-12 22:17:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59459 to 44196. [2021-06-12 22:17:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44196 states, 44195 states have (on average 3.85188369725082) internal successors, (170234), 44195 states have internal predecessors, (170234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44196 states to 44196 states and 170234 transitions. [2021-06-12 22:17:17,685 INFO L78 Accepts]: Start accepts. Automaton has 44196 states and 170234 transitions. Word has length 28 [2021-06-12 22:17:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:17,685 INFO L482 AbstractCegarLoop]: Abstraction has 44196 states and 170234 transitions. [2021-06-12 22:17:17,685 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) [2021-06-12 22:17:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 44196 states and 170234 transitions. [2021-06-12 22:17:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:17,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:17,754 INFO L472 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] [2021-06-12 22:17:17,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-12 22:17:17,954 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-12 22:17:17,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:17,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098980416] [2021-06-12 22:17:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:17,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098980416] [2021-06-12 22:17:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098980416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509100696] [2021-06-12 22:17:17,992 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 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 [2021-06-12 22:17:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:18,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509100696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:18,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:18,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:17:18,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654247610] [2021-06-12 22:17:18,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:18,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:18,096 INFO L87 Difference]: Start difference. First operand 44196 states and 170234 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) [2021-06-12 22:17:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:19,344 INFO L93 Difference]: Finished difference Result 58944 states and 221360 transitions. [2021-06-12 22:17:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:17:19,345 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 [2021-06-12 22:17:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:19,671 INFO L225 Difference]: With dead ends: 58944 [2021-06-12 22:17:19,672 INFO L226 Difference]: Without dead ends: 58920 [2021-06-12 22:17:19,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:17:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58920 states. [2021-06-12 22:17:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58920 to 44182. [2021-06-12 22:17:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44182 states, 44181 states have (on average 3.8518593965731878) internal successors, (170179), 44181 states have internal predecessors, (170179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44182 states to 44182 states and 170179 transitions. [2021-06-12 22:17:20,995 INFO L78 Accepts]: Start accepts. Automaton has 44182 states and 170179 transitions. Word has length 28 [2021-06-12 22:17:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:20,995 INFO L482 AbstractCegarLoop]: Abstraction has 44182 states and 170179 transitions. [2021-06-12 22:17:20,995 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) [2021-06-12 22:17:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 44182 states and 170179 transitions. [2021-06-12 22:17:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:21,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:21,067 INFO L472 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] [2021-06-12 22:17:21,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:21,268 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-12 22:17:21,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:21,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998475339] [2021-06-12 22:17:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:21,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:21,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998475339] [2021-06-12 22:17:21,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998475339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235332161] [2021-06-12 22:17:21,307 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 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 [2021-06-12 22:17:21,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:21,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:21,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:21,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235332161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:21,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:17:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564249794] [2021-06-12 22:17:21,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:21,402 INFO L87 Difference]: Start difference. First operand 44182 states and 170179 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) [2021-06-12 22:17:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:22,632 INFO L93 Difference]: Finished difference Result 58726 states and 220667 transitions. [2021-06-12 22:17:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:22,633 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 [2021-06-12 22:17:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:22,795 INFO L225 Difference]: With dead ends: 58726 [2021-06-12 22:17:22,796 INFO L226 Difference]: Without dead ends: 58686 [2021-06-12 22:17:22,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:17:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58686 states. [2021-06-12 22:17:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58686 to 44531. [2021-06-12 22:17:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44531 states, 44530 states have (on average 3.853761509094992) internal successors, (171608), 44530 states have internal predecessors, (171608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44531 states to 44531 states and 171608 transitions. [2021-06-12 22:17:24,123 INFO L78 Accepts]: Start accepts. Automaton has 44531 states and 171608 transitions. Word has length 28 [2021-06-12 22:17:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:24,123 INFO L482 AbstractCegarLoop]: Abstraction has 44531 states and 171608 transitions. [2021-06-12 22:17:24,123 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) [2021-06-12 22:17:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44531 states and 171608 transitions. [2021-06-12 22:17:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:24,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:24,190 INFO L472 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] [2021-06-12 22:17:24,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:24,390 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:24,391 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-12 22:17:24,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:24,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278229721] [2021-06-12 22:17:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:24,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:24,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278229721] [2021-06-12 22:17:24,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278229721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:24,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509032758] [2021-06-12 22:17:24,428 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 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 [2021-06-12 22:17:24,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:17:24,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:24,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:24,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509032758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:24,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:24,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:17:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028929748] [2021-06-12 22:17:24,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:24,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:24,541 INFO L87 Difference]: Start difference. First operand 44531 states and 171608 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)