/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/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:14:05,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:14:05,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:14:05,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:14:05,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:14:05,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:14:05,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:14:05,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:14:05,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:14:05,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:14:05,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:14:05,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:14:05,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:14:05,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:14:05,725 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:14:05,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:14:05,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:14:05,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:14:05,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:14:05,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:14:05,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:14:05,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:14:05,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:14:05,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:14:05,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:14:05,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:14:05,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:14:05,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:14:05,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:14:05,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:14:05,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:14:05,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:14:05,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:14:05,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:14:05,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:14:05,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:14:05,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:14:05,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:14:05,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:14:05,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:14:06,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:14:06,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:14:06,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:14:06,055 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:14:06,058 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:14:06,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-07-13 19:14:06,059 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-07-13 19:14:06,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:14:06,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:14:06,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:14:06,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:14:06,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:14:06,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:14:06,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:14:06,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:14:06,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:14:06,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... [2021-07-13 19:14:06,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:14:06,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:14:06,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:14:06,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:14:06,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:14:06,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:14:06,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:14:06,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:14:06,199 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:14:06,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:14:06,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:14:06,199 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:14:06,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:14:06,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:14:06,199 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:14:06,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:14:06,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:14:06,201 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:14:06,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:14:06,343 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:14:06,345 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:14:06 BoogieIcfgContainer [2021-07-13 19:14:06,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:14:06,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:14:06,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:14:06,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:14:06,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:14:06" (1/2) ... [2021-07-13 19:14:06,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74156d0b and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:14:06, skipping insertion in model container [2021-07-13 19:14:06,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:14:06" (2/2) ... [2021-07-13 19:14:06,352 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-07-13 19:14:06,356 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:14:06,357 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:14:06,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:14:06,358 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:14:06,390 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:14:06,410 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:14:06,428 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:14:06,428 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:14:06,429 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:14:06,429 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:14:06,429 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:14:06,429 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:14:06,429 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:14:06,429 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:14:06,444 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-07-13 19:14:06,481 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:14:06,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:06,496 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:06,497 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-07-13 19:14:06,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619536573] [2021-07-13 19:14:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:06,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619536573] [2021-07-13 19:14:06,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619536573] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:06,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:06,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:14:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053112321] [2021-07-13 19:14:06,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:14:06,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:14:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:14:06,788 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:06,851 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-07-13 19:14:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:14:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:14:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:06,883 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:14:06,883 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:14:06,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:14:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:14:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-07-13 19:14:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-07-13 19:14:06,934 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-07-13 19:14:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:06,935 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-07-13 19:14:06,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-07-13 19:14:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:06,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:06,941 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:06,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:14:06,942 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-07-13 19:14:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:06,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769506853] [2021-07-13 19:14:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:06,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769506853] [2021-07-13 19:14:06,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769506853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96546158] [2021-07-13 19:14:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:14:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96546158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:07,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:14:07,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16983053] [2021-07-13 19:14:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:14:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:14:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:14:07,171 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,285 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-07-13 19:14:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,293 INFO L225 Difference]: With dead ends: 344 [2021-07-13 19:14:07,294 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:14:07,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:14:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-07-13 19:14:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-07-13 19:14:07,346 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-07-13 19:14:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,346 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-07-13 19:14:07,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-07-13 19:14:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:07,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,348 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:14:07,577 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-07-13 19:14:07,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244176393] [2021-07-13 19:14:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244176393] [2021-07-13 19:14:07,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244176393] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:07,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:07,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:14:07,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604367704] [2021-07-13 19:14:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:14:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:14:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:14:07,604 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,638 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-07-13 19:14:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:14:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,641 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:14:07,641 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:14:07,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:14:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-07-13 19:14:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-07-13 19:14:07,655 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-07-13 19:14:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,656 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-07-13 19:14:07,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-07-13 19:14:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:07,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,657 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:14:07,658 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-07-13 19:14:07,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730724209] [2021-07-13 19:14:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730724209] [2021-07-13 19:14:07,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730724209] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:07,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:07,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:14:07,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878242105] [2021-07-13 19:14:07,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:14:07,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:14:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:07,732 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,802 INFO L93 Difference]: Finished difference Result 241 states and 641 transitions. [2021-07-13 19:14:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:07,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,805 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:14:07,805 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:14:07,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:14:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:14:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2021-07-13 19:14:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8272251308900525) internal successors, (540), 191 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 540 transitions. [2021-07-13 19:14:07,823 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 540 transitions. Word has length 17 [2021-07-13 19:14:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,824 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 540 transitions. [2021-07-13 19:14:07,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 540 transitions. [2021-07-13 19:14:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:07,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,829 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:14:07,829 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 2 times [2021-07-13 19:14:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417133458] [2021-07-13 19:14:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417133458] [2021-07-13 19:14:07,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417133458] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:07,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:07,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:14:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663954576] [2021-07-13 19:14:07,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:14:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:14:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:14:07,875 INFO L87 Difference]: Start difference. First operand 192 states and 540 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,900 INFO L93 Difference]: Finished difference Result 214 states and 609 transitions. [2021-07-13 19:14:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:14:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,901 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:14:07,902 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:14:07,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:14:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:14:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-07-13 19:14:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-07-13 19:14:07,911 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-07-13 19:14:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,911 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-07-13 19:14:07,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-07-13 19:14:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:07,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,913 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:14:07,914 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 3 times [2021-07-13 19:14:07,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443827761] [2021-07-13 19:14:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443827761] [2021-07-13 19:14:07,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443827761] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:07,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:07,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:14:07,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641222264] [2021-07-13 19:14:07,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:14:07,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:14:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:07,976 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,012 INFO L93 Difference]: Finished difference Result 254 states and 707 transitions. [2021-07-13 19:14:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:14:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,018 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:14:08,018 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:14:08,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:14:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-07-13 19:14:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-07-13 19:14:08,033 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 17 [2021-07-13 19:14:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:08,034 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-07-13 19:14:08,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-07-13 19:14:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:08,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:08,035 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:14:08,036 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 2 times [2021-07-13 19:14:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922573452] [2021-07-13 19:14:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922573452] [2021-07-13 19:14:08,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922573452] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:08,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:08,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:14:08,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477897474] [2021-07-13 19:14:08,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:14:08,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:14:08,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:14:08,103 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,135 INFO L93 Difference]: Finished difference Result 245 states and 714 transitions. [2021-07-13 19:14:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:14:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,138 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:14:08,138 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:14:08,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:14:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:14:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-07-13 19:14:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9624413145539905) internal successors, (631), 213 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 631 transitions. [2021-07-13 19:14:08,150 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 631 transitions. Word has length 17 [2021-07-13 19:14:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:08,151 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 631 transitions. [2021-07-13 19:14:08,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 631 transitions. [2021-07-13 19:14:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:14:08,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:08,152 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:14:08,152 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 3 times [2021-07-13 19:14:08,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825585170] [2021-07-13 19:14:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825585170] [2021-07-13 19:14:08,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825585170] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:14:08,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:14:08,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:14:08,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114884169] [2021-07-13 19:14:08,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:14:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:14:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:08,224 INFO L87 Difference]: Start difference. First operand 214 states and 631 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,261 INFO L93 Difference]: Finished difference Result 237 states and 678 transitions. [2021-07-13 19:14:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:14:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:14:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,263 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:14:08,263 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:14:08,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:14:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:14:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2021-07-13 19:14:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9583333333333335) internal successors, (568), 192 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 568 transitions. [2021-07-13 19:14:08,270 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 568 transitions. Word has length 17 [2021-07-13 19:14:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:08,271 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 568 transitions. [2021-07-13 19:14:08,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 568 transitions. [2021-07-13 19:14:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:08,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:08,272 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:14:08,272 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1586125762, now seen corresponding path program 1 times [2021-07-13 19:14:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594835055] [2021-07-13 19:14:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594835055] [2021-07-13 19:14:08,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594835055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133880054] [2021-07-13 19:14:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:14:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133880054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:08,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 19:14:08,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444379287] [2021-07-13 19:14:08,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:08,428 INFO L87 Difference]: Start difference. First operand 193 states and 568 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,494 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-07-13 19:14:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:14:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,496 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:14:08,496 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:14:08,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:14:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-07-13 19:14:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-07-13 19:14:08,503 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-07-13 19:14:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:08,503 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-07-13 19:14:08,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-07-13 19:14:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:08,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:08,504 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,727 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-07-13 19:14:08,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432507991] [2021-07-13 19:14:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432507991] [2021-07-13 19:14:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432507991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427157271] [2021-07-13 19:14:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427157271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:09,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:09,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024545959] [2021-07-13 19:14:09,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:09,059 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:09,197 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-07-13 19:14:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 21 [2021-07-13 19:14:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:09,200 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:14:09,200 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:14:09,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:14:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-07-13 19:14:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-07-13 19:14:09,208 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-07-13 19:14:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-07-13 19:14:09,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-07-13 19:14:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:09,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:09,211 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:09,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:14:09,425 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-07-13 19:14:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586518600] [2021-07-13 19:14:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:09,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586518600] [2021-07-13 19:14:09,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586518600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530809224] [2021-07-13 19:14:09,486 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:09,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530809224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:09,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533018127] [2021-07-13 19:14:09,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:09,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:09,625 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:09,740 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-07-13 19:14:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 21 [2021-07-13 19:14:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:09,756 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:14:09,756 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:14:09,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:14:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-07-13 19:14:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-07-13 19:14:09,766 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-07-13 19:14:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:09,766 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-07-13 19:14:09,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-07-13 19:14:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:09,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:09,769 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:09,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,985 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-07-13 19:14:09,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:09,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475958277] [2021-07-13 19:14:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:10,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475958277] [2021-07-13 19:14:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475958277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745971866] [2021-07-13 19:14:10,071 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:10,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:14:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:10,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:10,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745971866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:10,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013794112] [2021-07-13 19:14:10,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:10,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:10,244 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:10,334 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-07-13 19:14:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 21 [2021-07-13 19:14:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:10,337 INFO L225 Difference]: With dead ends: 413 [2021-07-13 19:14:10,337 INFO L226 Difference]: Without dead ends: 398 [2021-07-13 19:14:10,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-07-13 19:14:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-07-13 19:14:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-07-13 19:14:10,347 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-07-13 19:14:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:10,347 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-07-13 19:14:10,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-07-13 19:14:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:10,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:10,348 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:10,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:14:10,572 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-07-13 19:14:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134304822] [2021-07-13 19:14:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:10,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:10,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134304822] [2021-07-13 19:14:10,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134304822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133207427] [2021-07-13 19:14:10,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:10,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:10,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133207427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:10,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:10,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461709169] [2021-07-13 19:14:10,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:10,770 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:10,864 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-07-13 19:14:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 21 [2021-07-13 19:14:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:10,867 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:14:10,867 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:14:10,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:14:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-07-13 19:14:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-07-13 19:14:10,876 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-07-13 19:14:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:10,876 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-07-13 19:14:10,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-07-13 19:14:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:10,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:10,878 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,100 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-07-13 19:14:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966983119] [2021-07-13 19:14:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966983119] [2021-07-13 19:14:11,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966983119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932516193] [2021-07-13 19:14:11,172 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:11,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932516193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:11,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789883131] [2021-07-13 19:14:11,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:11,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:11,294 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:11,398 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-07-13 19:14:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 21 [2021-07-13 19:14:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:11,403 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:14:11,403 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:14:11,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:14:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-07-13 19:14:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-07-13 19:14:11,414 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-07-13 19:14:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-07-13 19:14:11,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-07-13 19:14:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:14:11,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:11,416 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:14:11,633 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-07-13 19:14:11,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729460363] [2021-07-13 19:14:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729460363] [2021-07-13 19:14:11,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729460363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900944528] [2021-07-13 19:14:11,688 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:14:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900944528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:11,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491845988] [2021-07-13 19:14:11,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:11,824 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:11,916 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-07-13 19:14:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:14:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-07-13 19:14:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:11,919 INFO L225 Difference]: With dead ends: 473 [2021-07-13 19:14:11,919 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:14:11,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:14:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-07-13 19:14:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-07-13 19:14:11,930 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-07-13 19:14:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:11,930 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-07-13 19:14:11,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-07-13 19:14:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:11,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:11,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:12,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:14:12,146 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-07-13 19:14:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:12,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884404090] [2021-07-13 19:14:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:12,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884404090] [2021-07-13 19:14:12,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884404090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381723246] [2021-07-13 19:14:12,188 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381723246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:12,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:12,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564733479] [2021-07-13 19:14:12,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:12,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:12,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:12,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:12,314 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:12,461 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-07-13 19:14:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 23 [2021-07-13 19:14:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:12,465 INFO L225 Difference]: With dead ends: 749 [2021-07-13 19:14:12,466 INFO L226 Difference]: Without dead ends: 749 [2021-07-13 19:14:12,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-13 19:14:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-07-13 19:14:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-07-13 19:14:12,480 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-07-13 19:14:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:12,480 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-07-13 19:14:12,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-07-13 19:14:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:12,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:12,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:12,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:14:12,703 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-07-13 19:14:12,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:12,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519050414] [2021-07-13 19:14:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:12,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519050414] [2021-07-13 19:14:12,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519050414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506061517] [2021-07-13 19:14:12,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:12,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506061517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:12,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:14:12,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375420483] [2021-07-13 19:14:12,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:12,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:12,838 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:12,979 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-07-13 19:14:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-07-13 19:14:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:12,983 INFO L225 Difference]: With dead ends: 758 [2021-07-13 19:14:12,983 INFO L226 Difference]: Without dead ends: 733 [2021-07-13 19:14:12,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-07-13 19:14:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-07-13 19:14:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-07-13 19:14:13,001 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-07-13 19:14:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,001 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-07-13 19:14:13,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-07-13 19:14:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:13,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,003 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:13,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:14:13,226 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-07-13 19:14:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:13,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645452683] [2021-07-13 19:14:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645452683] [2021-07-13 19:14:13,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645452683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681212784] [2021-07-13 19:14:13,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:13,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:13,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681212784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:13,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:14:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118009337] [2021-07-13 19:14:13,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:13,346 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:13,442 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-07-13 19:14:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:14:13,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:14:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:13,449 INFO L225 Difference]: With dead ends: 1311 [2021-07-13 19:14:13,449 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 19:14:13,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 19:14:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-07-13 19:14:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-07-13 19:14:13,478 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-07-13 19:14:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,479 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-07-13 19:14:13,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-07-13 19:14:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:13,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:13,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:14:13,705 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-07-13 19:14:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:13,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14311859] [2021-07-13 19:14:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:13,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:13,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14311859] [2021-07-13 19:14:13,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14311859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158566632] [2021-07-13 19:14:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:13,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158566632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:13,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 19:14:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120170020] [2021-07-13 19:14:13,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:13,842 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:13,940 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-07-13 19:14:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23 [2021-07-13 19:14:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:13,946 INFO L225 Difference]: With dead ends: 1047 [2021-07-13 19:14:13,947 INFO L226 Difference]: Without dead ends: 1047 [2021-07-13 19:14:13,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-07-13 19:14:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-07-13 19:14:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-07-13 19:14:13,971 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-07-13 19:14:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,972 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-07-13 19:14:13,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-07-13 19:14:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:13,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:14,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,197 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-07-13 19:14:14,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231913995] [2021-07-13 19:14:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231913995] [2021-07-13 19:14:14,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231913995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620457751] [2021-07-13 19:14:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:14,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620457751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 19:14:14,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180511126] [2021-07-13 19:14:14,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:14,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:14,355 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:14,468 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-07-13 19:14:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23 [2021-07-13 19:14:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:14,474 INFO L225 Difference]: With dead ends: 1062 [2021-07-13 19:14:14,474 INFO L226 Difference]: Without dead ends: 1056 [2021-07-13 19:14:14,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-13 19:14:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-07-13 19:14:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-07-13 19:14:14,500 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-07-13 19:14:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:14,500 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-07-13 19:14:14,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-07-13 19:14:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:14,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:14,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:14,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-07-13 19:14:14,717 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-07-13 19:14:14,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270289688] [2021-07-13 19:14:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270289688] [2021-07-13 19:14:14,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270289688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875679227] [2021-07-13 19:14:14,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875679227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:14:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191254161] [2021-07-13 19:14:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:14,831 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,242 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-07-13 19:14:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:14:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 23 [2021-07-13 19:14:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,255 INFO L225 Difference]: With dead ends: 2185 [2021-07-13 19:14:15,255 INFO L226 Difference]: Without dead ends: 2149 [2021-07-13 19:14:15,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:14:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-13 19:14:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-07-13 19:14:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-07-13 19:14:15,314 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-07-13 19:14:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,314 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-07-13 19:14:15,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-07-13 19:14:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:15,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:15,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:15,533 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-07-13 19:14:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476009534] [2021-07-13 19:14:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:15,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:15,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476009534] [2021-07-13 19:14:15,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476009534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195692100] [2021-07-13 19:14:15,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:15,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195692100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:15,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 19:14:15,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408345015] [2021-07-13 19:14:15,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:15,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:15,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:15,655 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,754 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-07-13 19:14:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23 [2021-07-13 19:14:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,762 INFO L225 Difference]: With dead ends: 1660 [2021-07-13 19:14:15,763 INFO L226 Difference]: Without dead ends: 1660 [2021-07-13 19:14:15,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-07-13 19:14:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-07-13 19:14:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-07-13 19:14:15,798 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-07-13 19:14:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,798 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-07-13 19:14:15,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-07-13 19:14:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:15,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,802 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:14:16,017 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-07-13 19:14:16,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331799477] [2021-07-13 19:14:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331799477] [2021-07-13 19:14:16,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331799477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268186458] [2021-07-13 19:14:16,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268186458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:16,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:14:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306195949] [2021-07-13 19:14:16,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:16,154 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:16,566 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-07-13 19:14:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:14:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2021-07-13 19:14:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:16,578 INFO L225 Difference]: With dead ends: 2541 [2021-07-13 19:14:16,578 INFO L226 Difference]: Without dead ends: 2369 [2021-07-13 19:14:16,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:14:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-07-13 19:14:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-07-13 19:14:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-07-13 19:14:16,644 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-07-13 19:14:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:16,644 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-07-13 19:14:16,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-07-13 19:14:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:16,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:16,649 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,871 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-07-13 19:14:16,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445981536] [2021-07-13 19:14:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445981536] [2021-07-13 19:14:16,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445981536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204411823] [2021-07-13 19:14:16,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:16,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204411823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:14:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967352511] [2021-07-13 19:14:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:17,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:17,015 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:17,393 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-07-13 19:14:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:14:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2021-07-13 19:14:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:17,410 INFO L225 Difference]: With dead ends: 4179 [2021-07-13 19:14:17,410 INFO L226 Difference]: Without dead ends: 4076 [2021-07-13 19:14:17,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:14:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-07-13 19:14:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-07-13 19:14:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-07-13 19:14:17,495 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-07-13 19:14:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:17,496 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-07-13 19:14:17,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-07-13 19:14:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:17,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:17,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:17,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:14:17,727 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-07-13 19:14:17,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:17,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775783554] [2021-07-13 19:14:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775783554] [2021-07-13 19:14:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775783554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010850272] [2021-07-13 19:14:17,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:17,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010850272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-07-13 19:14:17,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876767436] [2021-07-13 19:14:17,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:17,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:17,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:17,882 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:18,017 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-07-13 19:14:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-07-13 19:14:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:18,029 INFO L225 Difference]: With dead ends: 3396 [2021-07-13 19:14:18,029 INFO L226 Difference]: Without dead ends: 3345 [2021-07-13 19:14:18,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-07-13 19:14:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-07-13 19:14:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-07-13 19:14:18,107 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-07-13 19:14:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:18,108 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-07-13 19:14:18,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-07-13 19:14:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:18,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:18,115 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:18,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:14:18,337 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-07-13 19:14:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:18,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842971563] [2021-07-13 19:14:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:18,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:18,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842971563] [2021-07-13 19:14:18,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842971563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491629368] [2021-07-13 19:14:18,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:18,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491629368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:18,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:14:18,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133383002] [2021-07-13 19:14:18,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:14:18,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:18,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:14:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:14:18,470 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:18,543 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-07-13 19:14:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:14:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 23 [2021-07-13 19:14:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:18,574 INFO L225 Difference]: With dead ends: 4023 [2021-07-13 19:14:18,574 INFO L226 Difference]: Without dead ends: 4005 [2021-07-13 19:14:18,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:14:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-07-13 19:14:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-07-13 19:14:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-07-13 19:14:18,714 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-07-13 19:14:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:18,714 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-07-13 19:14:18,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-07-13 19:14:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:18,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:18,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:14:18,933 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-07-13 19:14:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286127234] [2021-07-13 19:14:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:18,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:18,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286127234] [2021-07-13 19:14:18,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286127234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534985396] [2021-07-13 19:14:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534985396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:19,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:14:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257968410] [2021-07-13 19:14:19,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:19,047 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:19,478 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-07-13 19:14:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:14:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 23 [2021-07-13 19:14:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:19,518 INFO L225 Difference]: With dead ends: 8888 [2021-07-13 19:14:19,518 INFO L226 Difference]: Without dead ends: 8754 [2021-07-13 19:14:19,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:14:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-07-13 19:14:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-07-13 19:14:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-07-13 19:14:19,759 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-07-13 19:14:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:19,759 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-07-13 19:14:19,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-07-13 19:14:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:19,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:19,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:19,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:14:19,989 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-07-13 19:14:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991262407] [2021-07-13 19:14:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:20,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991262407] [2021-07-13 19:14:20,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991262407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920337324] [2021-07-13 19:14:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920337324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:20,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:14:20,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745594258] [2021-07-13 19:14:20,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:14:20,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:14:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:14:20,097 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:20,191 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-07-13 19:14:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:14:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23 [2021-07-13 19:14:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:20,209 INFO L225 Difference]: With dead ends: 6626 [2021-07-13 19:14:20,209 INFO L226 Difference]: Without dead ends: 6576 [2021-07-13 19:14:20,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-07-13 19:14:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-07-13 19:14:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-07-13 19:14:20,354 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-07-13 19:14:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:20,354 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-07-13 19:14:20,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-07-13 19:14:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:20,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:20,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:20,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:14:20,589 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-07-13 19:14:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:20,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367274999] [2021-07-13 19:14:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:20,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367274999] [2021-07-13 19:14:20,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367274999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623333293] [2021-07-13 19:14:20,618 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:20,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623333293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:20,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:14:20,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575575376] [2021-07-13 19:14:20,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:20,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:20,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:20,769 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:21,238 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-07-13 19:14:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:14:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 23 [2021-07-13 19:14:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:21,270 INFO L225 Difference]: With dead ends: 12332 [2021-07-13 19:14:21,270 INFO L226 Difference]: Without dead ends: 12185 [2021-07-13 19:14:21,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:14:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-07-13 19:14:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-07-13 19:14:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-07-13 19:14:21,559 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-07-13 19:14:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:21,559 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-07-13 19:14:21,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-07-13 19:14:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:14:21,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:21,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:21,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,808 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-07-13 19:14:21,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:21,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326546838] [2021-07-13 19:14:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:21,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326546838] [2021-07-13 19:14:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326546838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702344451] [2021-07-13 19:14:21,844 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:14:21,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:21,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:14:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:21,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702344451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:21,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:14:21,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925929099] [2021-07-13 19:14:21,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:21,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:21,979 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:22,348 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-07-13 19:14:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:14:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 23 [2021-07-13 19:14:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:22,377 INFO L225 Difference]: With dead ends: 11103 [2021-07-13 19:14:22,377 INFO L226 Difference]: Without dead ends: 10950 [2021-07-13 19:14:22,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:14:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-07-13 19:14:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-07-13 19:14:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-07-13 19:14:22,705 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-07-13 19:14:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:22,705 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-07-13 19:14:22,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-07-13 19:14:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:22,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:22,733 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:22,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:22,958 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-07-13 19:14:22,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:22,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053168518] [2021-07-13 19:14:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053168518] [2021-07-13 19:14:23,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053168518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803893225] [2021-07-13 19:14:23,065 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:23,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:23,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:23,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803893225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:23,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:23,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477892934] [2021-07-13 19:14:23,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:23,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:23,347 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:23,743 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-07-13 19:14:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:23,770 INFO L225 Difference]: With dead ends: 8694 [2021-07-13 19:14:23,770 INFO L226 Difference]: Without dead ends: 8679 [2021-07-13 19:14:23,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-07-13 19:14:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-07-13 19:14:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-07-13 19:14:24,047 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-07-13 19:14:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:24,047 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-07-13 19:14:24,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-07-13 19:14:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:24,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:24,072 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,293 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-07-13 19:14:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927635493] [2021-07-13 19:14:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927635493] [2021-07-13 19:14:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927635493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983645975] [2021-07-13 19:14:24,382 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:24,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983645975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:24,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:24,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927207193] [2021-07-13 19:14:24,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:24,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:24,607 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:24,922 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-07-13 19:14:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:24,951 INFO L225 Difference]: With dead ends: 8977 [2021-07-13 19:14:24,951 INFO L226 Difference]: Without dead ends: 8896 [2021-07-13 19:14:24,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-07-13 19:14:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-07-13 19:14:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-07-13 19:14:25,337 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-07-13 19:14:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:25,337 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-07-13 19:14:25,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-07-13 19:14:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:25,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:25,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:25,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:14:25,587 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-07-13 19:14:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:25,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227878343] [2021-07-13 19:14:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:25,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227878343] [2021-07-13 19:14:25,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227878343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869428038] [2021-07-13 19:14:25,683 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:14:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869428038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734126660] [2021-07-13 19:14:25,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:25,908 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,234 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-07-13 19:14:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:26,267 INFO L225 Difference]: With dead ends: 9107 [2021-07-13 19:14:26,267 INFO L226 Difference]: Without dead ends: 9029 [2021-07-13 19:14:26,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-07-13 19:14:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-07-13 19:14:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-07-13 19:14:26,591 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-07-13 19:14:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:26,591 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-07-13 19:14:26,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-07-13 19:14:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:26,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:26,618 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,833 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-07-13 19:14:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227651639] [2021-07-13 19:14:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:26,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:26,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227651639] [2021-07-13 19:14:26,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227651639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:26,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586086023] [2021-07-13 19:14:26,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586086023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:27,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:27,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285522896] [2021-07-13 19:14:27,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:27,145 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:27,494 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-07-13 19:14:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:27,516 INFO L225 Difference]: With dead ends: 9134 [2021-07-13 19:14:27,516 INFO L226 Difference]: Without dead ends: 9104 [2021-07-13 19:14:27,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-07-13 19:14:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-07-13 19:14:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-07-13 19:14:27,702 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-07-13 19:14:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:27,702 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-07-13 19:14:27,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-07-13 19:14:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:27,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:27,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:27,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:14:27,937 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-07-13 19:14:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:27,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930964264] [2021-07-13 19:14:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:28,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930964264] [2021-07-13 19:14:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930964264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728469944] [2021-07-13 19:14:28,020 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:28,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:28,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728469944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:28,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:28,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510398276] [2021-07-13 19:14:28,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:28,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:28,230 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:28,578 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-07-13 19:14:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:28,606 INFO L225 Difference]: With dead ends: 9600 [2021-07-13 19:14:28,606 INFO L226 Difference]: Without dead ends: 9541 [2021-07-13 19:14:28,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-07-13 19:14:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-07-13 19:14:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-07-13 19:14:28,816 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-07-13 19:14:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:28,816 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-07-13 19:14:28,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-07-13 19:14:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:28,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:28,833 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:29,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,033 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-07-13 19:14:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:29,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110870791] [2021-07-13 19:14:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:29,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110870791] [2021-07-13 19:14:29,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110870791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151394939] [2021-07-13 19:14:29,114 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151394939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:29,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513049769] [2021-07-13 19:14:29,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:29,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:29,299 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:29,579 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-07-13 19:14:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:29,605 INFO L225 Difference]: With dead ends: 9517 [2021-07-13 19:14:29,605 INFO L226 Difference]: Without dead ends: 9477 [2021-07-13 19:14:29,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-07-13 19:14:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-07-13 19:14:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-07-13 19:14:29,798 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-07-13 19:14:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:29,798 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-07-13 19:14:29,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-07-13 19:14:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:29,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:29,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:14:30,017 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-07-13 19:14:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522420133] [2021-07-13 19:14:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:30,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522420133] [2021-07-13 19:14:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522420133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:30,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134111548] [2021-07-13 19:14:30,107 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:30,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:30,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134111548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:30,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:30,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:30,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806425347] [2021-07-13 19:14:30,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:30,368 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:30,649 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-07-13 19:14:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:30,673 INFO L225 Difference]: With dead ends: 9247 [2021-07-13 19:14:30,673 INFO L226 Difference]: Without dead ends: 9219 [2021-07-13 19:14:30,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-07-13 19:14:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-07-13 19:14:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-07-13 19:14:30,832 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-07-13 19:14:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:30,833 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-07-13 19:14:30,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-07-13 19:14:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:30,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:30,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:31,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,064 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-07-13 19:14:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562364747] [2021-07-13 19:14:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:31,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562364747] [2021-07-13 19:14:31,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562364747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127123475] [2021-07-13 19:14:31,141 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:14:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127123475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:31,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080222773] [2021-07-13 19:14:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:31,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:31,348 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:31,669 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-07-13 19:14:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:31,693 INFO L225 Difference]: With dead ends: 9354 [2021-07-13 19:14:31,693 INFO L226 Difference]: Without dead ends: 9280 [2021-07-13 19:14:31,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-07-13 19:14:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-07-13 19:14:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-07-13 19:14:31,896 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-07-13 19:14:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:31,897 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-07-13 19:14:31,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-07-13 19:14:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:31,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:31,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:32,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:14:32,137 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-07-13 19:14:32,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:32,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942408841] [2021-07-13 19:14:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:32,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942408841] [2021-07-13 19:14:32,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942408841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477319830] [2021-07-13 19:14:32,223 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:32,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:32,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477319830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:32,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164885600] [2021-07-13 19:14:32,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:32,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:32,426 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:32,739 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-07-13 19:14:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:32,767 INFO L225 Difference]: With dead ends: 9533 [2021-07-13 19:14:32,767 INFO L226 Difference]: Without dead ends: 9420 [2021-07-13 19:14:32,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-07-13 19:14:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-07-13 19:14:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-07-13 19:14:32,972 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-07-13 19:14:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:32,972 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-07-13 19:14:32,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-07-13 19:14:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:32,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:32,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:33,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:14:33,192 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-07-13 19:14:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:33,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984309357] [2021-07-13 19:14:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:33,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984309357] [2021-07-13 19:14:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984309357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218809852] [2021-07-13 19:14:33,270 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218809852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:33,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:33,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404847751] [2021-07-13 19:14:33,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:33,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:33,469 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:33,744 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-07-13 19:14:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:33,764 INFO L225 Difference]: With dead ends: 9439 [2021-07-13 19:14:33,764 INFO L226 Difference]: Without dead ends: 9424 [2021-07-13 19:14:33,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-07-13 19:14:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-07-13 19:14:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-07-13 19:14:33,925 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-07-13 19:14:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:33,926 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-07-13 19:14:33,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-07-13 19:14:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:33,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:33,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:34,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:14:34,143 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-07-13 19:14:34,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:34,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008000892] [2021-07-13 19:14:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:34,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008000892] [2021-07-13 19:14:34,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008000892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196210537] [2021-07-13 19:14:34,221 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:34,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:34,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:34,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196210537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:34,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197695401] [2021-07-13 19:14:34,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:34,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:34,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:34,392 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:34,706 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-07-13 19:14:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:34,784 INFO L225 Difference]: With dead ends: 9649 [2021-07-13 19:14:34,784 INFO L226 Difference]: Without dead ends: 9561 [2021-07-13 19:14:34,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-07-13 19:14:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-07-13 19:14:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-07-13 19:14:34,944 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-07-13 19:14:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:34,944 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-07-13 19:14:34,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-07-13 19:14:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:34,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:34,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:35,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 19:14:35,166 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-07-13 19:14:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:35,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957868918] [2021-07-13 19:14:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:35,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957868918] [2021-07-13 19:14:35,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957868918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628015162] [2021-07-13 19:14:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:14:35,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:35,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628015162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427430964] [2021-07-13 19:14:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:35,466 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:35,766 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-07-13 19:14:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:35,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:35,792 INFO L225 Difference]: With dead ends: 9931 [2021-07-13 19:14:35,792 INFO L226 Difference]: Without dead ends: 9855 [2021-07-13 19:14:35,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-07-13 19:14:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-07-13 19:14:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-07-13 19:14:35,957 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-07-13 19:14:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:35,957 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-07-13 19:14:35,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-07-13 19:14:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:35,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:35,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:36,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:36,174 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-07-13 19:14:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:36,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155521924] [2021-07-13 19:14:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:36,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:36,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155521924] [2021-07-13 19:14:36,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155521924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652961284] [2021-07-13 19:14:36,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:36,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:36,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:36,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652961284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:36,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:36,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437000961] [2021-07-13 19:14:36,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:36,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:36,443 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:36,704 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-07-13 19:14:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:36,733 INFO L225 Difference]: With dead ends: 9863 [2021-07-13 19:14:36,733 INFO L226 Difference]: Without dead ends: 9764 [2021-07-13 19:14:36,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-07-13 19:14:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-07-13 19:14:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-07-13 19:14:36,916 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-07-13 19:14:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:36,917 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-07-13 19:14:36,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-07-13 19:14:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:36,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:36,935 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:14:37,136 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-07-13 19:14:37,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111751070] [2021-07-13 19:14:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:37,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111751070] [2021-07-13 19:14:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111751070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727502210] [2021-07-13 19:14:37,208 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:37,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727502210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:37,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:37,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171877894] [2021-07-13 19:14:37,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:37,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:37,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:37,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:37,414 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,712 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-07-13 19:14:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,752 INFO L225 Difference]: With dead ends: 10085 [2021-07-13 19:14:37,752 INFO L226 Difference]: Without dead ends: 10009 [2021-07-13 19:14:37,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-07-13 19:14:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-07-13 19:14:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-07-13 19:14:38,028 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-07-13 19:14:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,028 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-07-13 19:14:38,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-07-13 19:14:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:38,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:38,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:14:38,247 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-07-13 19:14:38,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:38,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613252412] [2021-07-13 19:14:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613252412] [2021-07-13 19:14:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613252412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190135702] [2021-07-13 19:14:38,315 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190135702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:38,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259250052] [2021-07-13 19:14:38,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:38,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:38,486 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:38,706 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-07-13 19:14:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:38,733 INFO L225 Difference]: With dead ends: 10306 [2021-07-13 19:14:38,733 INFO L226 Difference]: Without dead ends: 10170 [2021-07-13 19:14:38,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-07-13 19:14:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-07-13 19:14:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-07-13 19:14:38,914 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-07-13 19:14:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,914 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-07-13 19:14:38,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-07-13 19:14:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:38,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:39,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,133 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-07-13 19:14:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173548395] [2021-07-13 19:14:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:39,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:39,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173548395] [2021-07-13 19:14:39,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173548395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410205897] [2021-07-13 19:14:39,216 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:39,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410205897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:39,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:39,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581924822] [2021-07-13 19:14:39,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:39,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:39,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:39,436 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:39,709 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-07-13 19:14:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:39,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:39,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:39,739 INFO L225 Difference]: With dead ends: 10112 [2021-07-13 19:14:39,739 INFO L226 Difference]: Without dead ends: 10046 [2021-07-13 19:14:39,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-07-13 19:14:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-07-13 19:14:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-07-13 19:14:39,914 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-07-13 19:14:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-07-13 19:14:39,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-07-13 19:14:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:39,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:39,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:40,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:14:40,133 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-07-13 19:14:40,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:40,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432969086] [2021-07-13 19:14:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:40,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432969086] [2021-07-13 19:14:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432969086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076281415] [2021-07-13 19:14:40,210 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:40,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076281415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:40,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501565240] [2021-07-13 19:14:40,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:40,406 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:40,635 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-07-13 19:14:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:40,660 INFO L225 Difference]: With dead ends: 10217 [2021-07-13 19:14:40,661 INFO L226 Difference]: Without dead ends: 10187 [2021-07-13 19:14:40,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-07-13 19:14:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-07-13 19:14:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-07-13 19:14:40,888 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-07-13 19:14:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:40,888 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-07-13 19:14:40,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-07-13 19:14:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:40,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:40,908 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:41,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,108 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-07-13 19:14:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:41,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692499478] [2021-07-13 19:14:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:41,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692499478] [2021-07-13 19:14:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692499478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103044209] [2021-07-13 19:14:41,178 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:41,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:41,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103044209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:41,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38967208] [2021-07-13 19:14:41,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:41,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:41,376 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:41,599 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-07-13 19:14:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:41,626 INFO L225 Difference]: With dead ends: 10876 [2021-07-13 19:14:41,626 INFO L226 Difference]: Without dead ends: 10826 [2021-07-13 19:14:41,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-07-13 19:14:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-07-13 19:14:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-07-13 19:14:41,800 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-07-13 19:14:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:41,800 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-07-13 19:14:41,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-07-13 19:14:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:41,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:41,817 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:42,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:14:42,017 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-07-13 19:14:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:42,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051293509] [2021-07-13 19:14:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:42,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051293509] [2021-07-13 19:14:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051293509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011120538] [2021-07-13 19:14:42,078 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:42,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:42,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011120538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:42,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513220365] [2021-07-13 19:14:42,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:42,278 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:42,501 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-07-13 19:14:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:42,527 INFO L225 Difference]: With dead ends: 10555 [2021-07-13 19:14:42,527 INFO L226 Difference]: Without dead ends: 10525 [2021-07-13 19:14:42,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-07-13 19:14:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-07-13 19:14:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-07-13 19:14:42,695 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-07-13 19:14:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:42,695 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-07-13 19:14:42,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-07-13 19:14:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:42,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:42,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:42,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:14:42,913 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-07-13 19:14:42,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:42,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489793587] [2021-07-13 19:14:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:42,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489793587] [2021-07-13 19:14:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489793587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369790239] [2021-07-13 19:14:42,980 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:43,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:43,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369790239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:43,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:43,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982837970] [2021-07-13 19:14:43,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:43,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:43,161 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:43,415 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-07-13 19:14:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:43,450 INFO L225 Difference]: With dead ends: 10625 [2021-07-13 19:14:43,450 INFO L226 Difference]: Without dead ends: 10529 [2021-07-13 19:14:43,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-07-13 19:14:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-07-13 19:14:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-07-13 19:14:43,752 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-07-13 19:14:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:43,752 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-07-13 19:14:43,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-07-13 19:14:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:43,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:43,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:43,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:14:43,974 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-07-13 19:14:43,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304806028] [2021-07-13 19:14:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304806028] [2021-07-13 19:14:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304806028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103388175] [2021-07-13 19:14:44,061 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:44,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103388175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:44,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726229367] [2021-07-13 19:14:44,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:44,281 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:44,582 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-07-13 19:14:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:44,614 INFO L225 Difference]: With dead ends: 11674 [2021-07-13 19:14:44,614 INFO L226 Difference]: Without dead ends: 11640 [2021-07-13 19:14:44,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-07-13 19:14:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-07-13 19:14:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-07-13 19:14:44,806 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-07-13 19:14:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:44,806 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-07-13 19:14:44,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-07-13 19:14:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:44,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:44,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:45,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:14:45,027 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-07-13 19:14:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:45,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660490716] [2021-07-13 19:14:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:45,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660490716] [2021-07-13 19:14:45,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660490716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953315827] [2021-07-13 19:14:45,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:45,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:45,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953315827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:45,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:45,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166469643] [2021-07-13 19:14:45,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:45,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:45,318 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:45,617 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-07-13 19:14:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:45,642 INFO L225 Difference]: With dead ends: 10738 [2021-07-13 19:14:45,642 INFO L226 Difference]: Without dead ends: 10723 [2021-07-13 19:14:45,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-07-13 19:14:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-07-13 19:14:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-07-13 19:14:45,809 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-07-13 19:14:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:45,809 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-07-13 19:14:45,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-07-13 19:14:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:45,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:45,827 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:46,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,028 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-07-13 19:14:46,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:46,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884605789] [2021-07-13 19:14:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:46,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884605789] [2021-07-13 19:14:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884605789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187412693] [2021-07-13 19:14:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:46,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187412693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:46,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:46,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441250018] [2021-07-13 19:14:46,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:46,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:46,271 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:46,537 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-07-13 19:14:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:46,567 INFO L225 Difference]: With dead ends: 11042 [2021-07-13 19:14:46,567 INFO L226 Difference]: Without dead ends: 10965 [2021-07-13 19:14:46,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-07-13 19:14:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-07-13 19:14:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-07-13 19:14:46,782 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-07-13 19:14:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:46,782 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-07-13 19:14:46,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-07-13 19:14:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:46,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:46,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:47,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:14:47,084 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-07-13 19:14:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:47,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980853361] [2021-07-13 19:14:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:47,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980853361] [2021-07-13 19:14:47,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980853361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893715156] [2021-07-13 19:14:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893715156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:47,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:47,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406259265] [2021-07-13 19:14:47,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:47,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:47,372 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:47,659 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-07-13 19:14:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:47,691 INFO L225 Difference]: With dead ends: 11185 [2021-07-13 19:14:47,692 INFO L226 Difference]: Without dead ends: 11145 [2021-07-13 19:14:47,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-07-13 19:14:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-07-13 19:14:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 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) [2021-07-13 19:14:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-07-13 19:14:47,918 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-07-13 19:14:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:47,918 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-07-13 19:14:47,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-07-13 19:14:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:47,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:47,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:48,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:48,138 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-07-13 19:14:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529746645] [2021-07-13 19:14:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:48,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:48,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529746645] [2021-07-13 19:14:48,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529746645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:48,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639499383] [2021-07-13 19:14:48,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:48,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:48,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:48,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:48,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639499383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:48,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:48,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224575189] [2021-07-13 19:14:48,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:48,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:48,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:48,427 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:48,755 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-07-13 19:14:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:48,785 INFO L225 Difference]: With dead ends: 10899 [2021-07-13 19:14:48,785 INFO L226 Difference]: Without dead ends: 10871 [2021-07-13 19:14:48,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-07-13 19:14:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-07-13 19:14:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-07-13 19:14:48,990 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-07-13 19:14:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:48,991 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-07-13 19:14:48,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-07-13 19:14:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:49,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:49,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:14:49,213 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:49,213 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-07-13 19:14:49,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:49,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123592892] [2021-07-13 19:14:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:49,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123592892] [2021-07-13 19:14:49,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123592892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278068069] [2021-07-13 19:14:49,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:49,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:49,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278068069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:49,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:49,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258888269] [2021-07-13 19:14:49,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:49,485 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:49,731 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-07-13 19:14:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:49,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:49,758 INFO L225 Difference]: With dead ends: 11018 [2021-07-13 19:14:49,758 INFO L226 Difference]: Without dead ends: 10908 [2021-07-13 19:14:49,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-07-13 19:14:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-07-13 19:14:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-07-13 19:14:49,942 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-07-13 19:14:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:49,942 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-07-13 19:14:49,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-07-13 19:14:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:49,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:50,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:14:50,161 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-07-13 19:14:50,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:50,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021746197] [2021-07-13 19:14:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:50,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021746197] [2021-07-13 19:14:50,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021746197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781557815] [2021-07-13 19:14:50,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:50,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:14:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781557815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:50,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:50,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210410535] [2021-07-13 19:14:50,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:50,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:50,434 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:50,829 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-07-13 19:14:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:50,860 INFO L225 Difference]: With dead ends: 11294 [2021-07-13 19:14:50,860 INFO L226 Difference]: Without dead ends: 11195 [2021-07-13 19:14:50,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-07-13 19:14:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-07-13 19:14:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-07-13 19:14:51,066 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-07-13 19:14:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:51,066 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-07-13 19:14:51,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-07-13 19:14:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:51,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:51,085 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:51,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:51,286 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-07-13 19:14:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:51,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688061626] [2021-07-13 19:14:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:51,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688061626] [2021-07-13 19:14:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688061626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971773546] [2021-07-13 19:14:51,357 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 [2021-07-13 19:14:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:51,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971773546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:51,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:51,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706294352] [2021-07-13 19:14:51,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:51,546 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:51,781 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-07-13 19:14:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:51,815 INFO L225 Difference]: With dead ends: 11367 [2021-07-13 19:14:51,815 INFO L226 Difference]: Without dead ends: 11337 [2021-07-13 19:14:51,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-07-13 19:14:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-07-13 19:14:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-07-13 19:14:52,029 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-07-13 19:14:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:52,029 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-07-13 19:14:52,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-07-13 19:14:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:52,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:52,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:52,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:14:52,249 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:52,250 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-07-13 19:14:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:52,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400284859] [2021-07-13 19:14:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:52,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400284859] [2021-07-13 19:14:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400284859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871417979] [2021-07-13 19:14:52,316 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:52,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:52,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871417979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:52,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616351748] [2021-07-13 19:14:52,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:52,478 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:52,694 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-07-13 19:14:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,723 INFO L225 Difference]: With dead ends: 11407 [2021-07-13 19:14:52,724 INFO L226 Difference]: Without dead ends: 11315 [2021-07-13 19:14:52,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-07-13 19:14:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-07-13 19:14:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-07-13 19:14:52,937 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-07-13 19:14:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-07-13 19:14:52,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-07-13 19:14:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:52,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:52,958 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:53,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:14:53,158 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-07-13 19:14:53,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:53,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98116999] [2021-07-13 19:14:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98116999] [2021-07-13 19:14:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98116999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841972468] [2021-07-13 19:14:53,241 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:53,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:53,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:53,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:53,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841972468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:53,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:53,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754102812] [2021-07-13 19:14:53,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:53,437 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:53,735 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-07-13 19:14:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:53,765 INFO L225 Difference]: With dead ends: 11235 [2021-07-13 19:14:53,765 INFO L226 Difference]: Without dead ends: 11220 [2021-07-13 19:14:53,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-07-13 19:14:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-07-13 19:14:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-07-13 19:14:54,006 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-07-13 19:14:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:54,007 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-07-13 19:14:54,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-07-13 19:14:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:54,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:54,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:54,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:14:54,224 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-07-13 19:14:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978606652] [2021-07-13 19:14:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978606652] [2021-07-13 19:14:54,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978606652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774437477] [2021-07-13 19:14:54,308 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:54,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:54,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774437477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:54,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200484072] [2021-07-13 19:14:54,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:54,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:54,507 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:54,718 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-07-13 19:14:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:54,744 INFO L225 Difference]: With dead ends: 11379 [2021-07-13 19:14:54,744 INFO L226 Difference]: Without dead ends: 11313 [2021-07-13 19:14:54,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-07-13 19:14:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-07-13 19:14:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-07-13 19:14:54,929 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-07-13 19:14:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:54,929 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-07-13 19:14:54,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-07-13 19:14:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:54,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:54,950 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:55,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,151 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-07-13 19:14:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:55,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888925215] [2021-07-13 19:14:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:55,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888925215] [2021-07-13 19:14:55,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888925215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179436624] [2021-07-13 19:14:55,241 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179436624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:55,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:55,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078058989] [2021-07-13 19:14:55,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:55,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:55,409 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:55,728 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-07-13 19:14:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:55,757 INFO L225 Difference]: With dead ends: 11510 [2021-07-13 19:14:55,757 INFO L226 Difference]: Without dead ends: 11480 [2021-07-13 19:14:55,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-07-13 19:14:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-07-13 19:14:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-07-13 19:14:55,964 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-07-13 19:14:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:55,965 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-07-13 19:14:55,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-07-13 19:14:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:55,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:55,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:56,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,185 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:56,186 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-07-13 19:14:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:56,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045971733] [2021-07-13 19:14:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:56,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045971733] [2021-07-13 19:14:56,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045971733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368972224] [2021-07-13 19:14:56,268 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368972224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:56,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:56,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686271225] [2021-07-13 19:14:56,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:56,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:56,451 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:56,699 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-07-13 19:14:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:56,731 INFO L225 Difference]: With dead ends: 11580 [2021-07-13 19:14:56,731 INFO L226 Difference]: Without dead ends: 11550 [2021-07-13 19:14:56,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-07-13 19:14:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-07-13 19:14:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-07-13 19:14:57,035 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-07-13 19:14:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:57,035 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-07-13 19:14:57,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-07-13 19:14:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:57,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:57,054 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:57,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:57,257 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-07-13 19:14:57,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:57,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628238580] [2021-07-13 19:14:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:57,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:57,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628238580] [2021-07-13 19:14:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628238580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326043563] [2021-07-13 19:14:57,343 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 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 [2021-07-13 19:14:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326043563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899769854] [2021-07-13 19:14:57,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:57,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:57,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:57,528 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:57,792 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-07-13 19:14:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:57,820 INFO L225 Difference]: With dead ends: 11545 [2021-07-13 19:14:57,820 INFO L226 Difference]: Without dead ends: 11507 [2021-07-13 19:14:57,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-07-13 19:14:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-07-13 19:14:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-07-13 19:14:58,031 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-07-13 19:14:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:58,031 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-07-13 19:14:58,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-07-13 19:14:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:58,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:58,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:58,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:58,274 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-07-13 19:14:58,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:58,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301383460] [2021-07-13 19:14:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:58,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:58,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301383460] [2021-07-13 19:14:58,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301383460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:58,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139115499] [2021-07-13 19:14:58,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:58,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:58,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139115499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636347514] [2021-07-13 19:14:58,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:58,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:58,581 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:58,943 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-07-13 19:14:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:58,983 INFO L225 Difference]: With dead ends: 11437 [2021-07-13 19:14:58,983 INFO L226 Difference]: Without dead ends: 11422 [2021-07-13 19:14:58,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-07-13 19:14:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-07-13 19:14:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-07-13 19:14:59,192 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-07-13 19:14:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:59,192 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-07-13 19:14:59,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-07-13 19:14:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:14:59,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:59,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:59,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 19:14:59,412 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-07-13 19:14:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:59,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686975237] [2021-07-13 19:14:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686975237] [2021-07-13 19:14:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686975237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557382021] [2021-07-13 19:14:59,496 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:59,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:14:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557382021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:59,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773030026] [2021-07-13 19:14:59,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:59,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:59,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:59,696 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:59,994 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-07-13 19:14:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:14:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:00,024 INFO L225 Difference]: With dead ends: 11677 [2021-07-13 19:15:00,024 INFO L226 Difference]: Without dead ends: 11625 [2021-07-13 19:15:00,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-07-13 19:15:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-07-13 19:15:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-07-13 19:15:00,356 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-07-13 19:15:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:00,356 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-07-13 19:15:00,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-07-13 19:15:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:00,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:00,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:00,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,576 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-07-13 19:15:00,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:00,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053316624] [2021-07-13 19:15:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053316624] [2021-07-13 19:15:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053316624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581111958] [2021-07-13 19:15:00,647 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:00,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581111958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:00,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258355489] [2021-07-13 19:15:00,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:00,833 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:01,168 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-07-13 19:15:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:01,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:01,200 INFO L225 Difference]: With dead ends: 11704 [2021-07-13 19:15:01,201 INFO L226 Difference]: Without dead ends: 11674 [2021-07-13 19:15:01,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-07-13 19:15:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-07-13 19:15:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-07-13 19:15:01,410 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-07-13 19:15:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:01,410 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-07-13 19:15:01,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-07-13 19:15:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:01,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:01,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:15:01,632 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-07-13 19:15:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122743205] [2021-07-13 19:15:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:01,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122743205] [2021-07-13 19:15:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122743205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118548046] [2021-07-13 19:15:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:01,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:15:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:01,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118548046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:01,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:01,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264653511] [2021-07-13 19:15:01,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:01,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:01,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:01,895 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:02,139 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-07-13 19:15:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:02,173 INFO L225 Difference]: With dead ends: 11586 [2021-07-13 19:15:02,174 INFO L226 Difference]: Without dead ends: 11512 [2021-07-13 19:15:02,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-07-13 19:15:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-07-13 19:15:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-07-13 19:15:02,407 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-07-13 19:15:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:02,407 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-07-13 19:15:02,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-07-13 19:15:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:02,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:02,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:02,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,633 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-07-13 19:15:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:02,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668782815] [2021-07-13 19:15:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:02,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:02,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668782815] [2021-07-13 19:15:02,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668782815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596035419] [2021-07-13 19:15:02,697 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596035419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:02,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:02,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022753456] [2021-07-13 19:15:02,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:02,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:02,851 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:03,107 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-07-13 19:15:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:03,142 INFO L225 Difference]: With dead ends: 11723 [2021-07-13 19:15:03,142 INFO L226 Difference]: Without dead ends: 11685 [2021-07-13 19:15:03,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-07-13 19:15:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-07-13 19:15:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-07-13 19:15:03,370 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-07-13 19:15:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:03,370 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-07-13 19:15:03,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-07-13 19:15:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:03,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:03,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:03,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:15:03,591 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-07-13 19:15:03,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:03,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305533610] [2021-07-13 19:15:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:03,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:03,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305533610] [2021-07-13 19:15:03,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305533610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092889542] [2021-07-13 19:15:03,661 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:03,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092889542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:03,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:03,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083109853] [2021-07-13 19:15:03,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:03,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:03,918 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:04,185 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-07-13 19:15:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:04,221 INFO L225 Difference]: With dead ends: 11793 [2021-07-13 19:15:04,222 INFO L226 Difference]: Without dead ends: 11741 [2021-07-13 19:15:04,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-07-13 19:15:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-07-13 19:15:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-07-13 19:15:04,512 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-07-13 19:15:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:04,512 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-07-13 19:15:04,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-07-13 19:15:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:04,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:04,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:04,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:04,735 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-07-13 19:15:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:04,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265198883] [2021-07-13 19:15:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:04,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265198883] [2021-07-13 19:15:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265198883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383653890] [2021-07-13 19:15:04,816 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:04,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:04,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383653890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:05,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:05,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112107424] [2021-07-13 19:15:05,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:05,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:05,006 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:05,256 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-07-13 19:15:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:05,289 INFO L225 Difference]: With dead ends: 11715 [2021-07-13 19:15:05,289 INFO L226 Difference]: Without dead ends: 11659 [2021-07-13 19:15:05,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-07-13 19:15:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-07-13 19:15:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-07-13 19:15:05,510 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-07-13 19:15:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:05,510 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-07-13 19:15:05,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-07-13 19:15:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:05,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:05,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:05,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:05,731 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:05,732 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-07-13 19:15:05,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:05,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718042163] [2021-07-13 19:15:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:05,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718042163] [2021-07-13 19:15:05,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718042163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889372853] [2021-07-13 19:15:05,813 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:05,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:15:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:06,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889372853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:06,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:06,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:06,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268933540] [2021-07-13 19:15:06,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:06,046 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:06,341 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-07-13 19:15:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:06,370 INFO L225 Difference]: With dead ends: 11675 [2021-07-13 19:15:06,371 INFO L226 Difference]: Without dead ends: 11649 [2021-07-13 19:15:06,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-07-13 19:15:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-07-13 19:15:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-07-13 19:15:06,580 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-07-13 19:15:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:06,580 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-07-13 19:15:06,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-07-13 19:15:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:06,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:06,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:06,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 19:15:06,803 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:06,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-07-13 19:15:06,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:06,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499380460] [2021-07-13 19:15:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:06,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:06,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499380460] [2021-07-13 19:15:06,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499380460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:06,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301848751] [2021-07-13 19:15:06,879 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:06,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:07,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301848751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:07,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:07,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:07,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681454277] [2021-07-13 19:15:07,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:07,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:07,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:07,043 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:07,332 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-07-13 19:15:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:07,365 INFO L225 Difference]: With dead ends: 12092 [2021-07-13 19:15:07,365 INFO L226 Difference]: Without dead ends: 12062 [2021-07-13 19:15:07,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-07-13 19:15:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-07-13 19:15:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-07-13 19:15:07,675 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-07-13 19:15:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:07,675 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-07-13 19:15:07,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-07-13 19:15:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:07,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:07,699 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:07,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:07,899 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-07-13 19:15:07,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:07,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731080905] [2021-07-13 19:15:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:07,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:07,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731080905] [2021-07-13 19:15:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731080905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:07,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781063866] [2021-07-13 19:15:07,982 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:08,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781063866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:08,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:08,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145985888] [2021-07-13 19:15:08,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:08,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:08,151 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:08,410 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-07-13 19:15:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:08,446 INFO L225 Difference]: With dead ends: 11997 [2021-07-13 19:15:08,446 INFO L226 Difference]: Without dead ends: 11917 [2021-07-13 19:15:08,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-07-13 19:15:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-07-13 19:15:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-07-13 19:15:08,688 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-07-13 19:15:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-07-13 19:15:08,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-07-13 19:15:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:08,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:08,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:08,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:08,909 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-07-13 19:15:08,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:08,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304156362] [2021-07-13 19:15:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304156362] [2021-07-13 19:15:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304156362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052800371] [2021-07-13 19:15:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:09,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052800371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799950746] [2021-07-13 19:15:09,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:09,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:09,162 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:09,426 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-07-13 19:15:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:09,456 INFO L225 Difference]: With dead ends: 11771 [2021-07-13 19:15:09,456 INFO L226 Difference]: Without dead ends: 11756 [2021-07-13 19:15:09,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-07-13 19:15:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-07-13 19:15:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-07-13 19:15:09,665 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-07-13 19:15:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:09,665 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-07-13 19:15:09,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-07-13 19:15:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:09,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:09,688 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:09,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 19:15:09,889 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-07-13 19:15:09,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:09,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338833833] [2021-07-13 19:15:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338833833] [2021-07-13 19:15:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338833833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416846427] [2021-07-13 19:15:09,960 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:09,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:10,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416846427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:10,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:10,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:10,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092295828] [2021-07-13 19:15:10,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:10,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:10,126 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:10,479 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-07-13 19:15:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:15:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:10,515 INFO L225 Difference]: With dead ends: 13036 [2021-07-13 19:15:10,515 INFO L226 Difference]: Without dead ends: 12976 [2021-07-13 19:15:10,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-07-13 19:15:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-07-13 19:15:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-07-13 19:15:10,728 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-07-13 19:15:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:10,729 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-07-13 19:15:10,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-07-13 19:15:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:10,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:10,749 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:10,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:10,950 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-07-13 19:15:10,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:10,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221293158] [2021-07-13 19:15:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221293158] [2021-07-13 19:15:11,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221293158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878074262] [2021-07-13 19:15:11,010 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:11,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:11,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878074262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:11,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677941554] [2021-07-13 19:15:11,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:11,264 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:11,455 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-07-13 19:15:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:11,489 INFO L225 Difference]: With dead ends: 12395 [2021-07-13 19:15:11,489 INFO L226 Difference]: Without dead ends: 12365 [2021-07-13 19:15:11,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-07-13 19:15:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-07-13 19:15:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-07-13 19:15:11,717 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-07-13 19:15:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:11,717 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-07-13 19:15:11,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-07-13 19:15:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:11,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:11,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:11,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 19:15:11,941 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-07-13 19:15:11,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:11,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159696486] [2021-07-13 19:15:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159696486] [2021-07-13 19:15:11,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159696486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414414389] [2021-07-13 19:15:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:12,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:15:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414414389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:12,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362147099] [2021-07-13 19:15:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:12,155 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:12,401 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-07-13 19:15:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:12,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:12,432 INFO L225 Difference]: With dead ends: 12368 [2021-07-13 19:15:12,432 INFO L226 Difference]: Without dead ends: 12338 [2021-07-13 19:15:12,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-07-13 19:15:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-07-13 19:15:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-07-13 19:15:12,656 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-07-13 19:15:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:12,657 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-07-13 19:15:12,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-07-13 19:15:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:12,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:12,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:12,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:15:12,878 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-07-13 19:15:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:12,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37233531] [2021-07-13 19:15:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:12,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:12,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37233531] [2021-07-13 19:15:12,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37233531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:12,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436828601] [2021-07-13 19:15:12,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:12,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436828601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:13,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185400188] [2021-07-13 19:15:13,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:13,089 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:13,359 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-07-13 19:15:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:13,401 INFO L225 Difference]: With dead ends: 12466 [2021-07-13 19:15:13,401 INFO L226 Difference]: Without dead ends: 12395 [2021-07-13 19:15:13,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-07-13 19:15:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-07-13 19:15:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-07-13 19:15:13,713 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-07-13 19:15:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-07-13 19:15:13,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-07-13 19:15:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:13,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:13,743 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:13,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 19:15:13,967 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:13,967 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-07-13 19:15:13,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:13,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56951817] [2021-07-13 19:15:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:14,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56951817] [2021-07-13 19:15:14,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56951817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015966618] [2021-07-13 19:15:14,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:14,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:15:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015966618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:14,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:14,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610966920] [2021-07-13 19:15:14,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:14,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:14,384 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:14,639 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-07-13 19:15:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:14,678 INFO L225 Difference]: With dead ends: 12451 [2021-07-13 19:15:14,678 INFO L226 Difference]: Without dead ends: 12413 [2021-07-13 19:15:14,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-07-13 19:15:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-07-13 19:15:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-07-13 19:15:14,987 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-07-13 19:15:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:14,987 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-07-13 19:15:14,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-07-13 19:15:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:15,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:15,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:15,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:15,212 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-07-13 19:15:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:15,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898796149] [2021-07-13 19:15:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:15,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898796149] [2021-07-13 19:15:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898796149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533992729] [2021-07-13 19:15:15,308 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 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 [2021-07-13 19:15:15,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:15:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:15,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533992729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:15,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:15,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965436295] [2021-07-13 19:15:15,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:15,491 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:15,759 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-07-13 19:15:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:15,796 INFO L225 Difference]: With dead ends: 12499 [2021-07-13 19:15:15,796 INFO L226 Difference]: Without dead ends: 12469 [2021-07-13 19:15:15,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-07-13 19:15:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-07-13 19:15:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-07-13 19:15:16,033 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-07-13 19:15:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:16,034 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-07-13 19:15:16,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-07-13 19:15:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:16,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:16,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:16,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:16,258 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-07-13 19:15:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:16,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500628317] [2021-07-13 19:15:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:16,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:16,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500628317] [2021-07-13 19:15:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500628317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:16,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312164277] [2021-07-13 19:15:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:16,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312164277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:16,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:16,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162146642] [2021-07-13 19:15:16,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:16,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:16,520 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:16,814 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-07-13 19:15:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:16,859 INFO L225 Difference]: With dead ends: 12648 [2021-07-13 19:15:16,859 INFO L226 Difference]: Without dead ends: 12604 [2021-07-13 19:15:16,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-07-13 19:15:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-07-13 19:15:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-07-13 19:15:17,171 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-07-13 19:15:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:17,172 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-07-13 19:15:17,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-07-13 19:15:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:17,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:17,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:17,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,417 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-07-13 19:15:17,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:17,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858421814] [2021-07-13 19:15:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858421814] [2021-07-13 19:15:17,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858421814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436042284] [2021-07-13 19:15:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436042284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:17,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059798331] [2021-07-13 19:15:17,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:17,700 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:17,960 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-07-13 19:15:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:18,018 INFO L225 Difference]: With dead ends: 12571 [2021-07-13 19:15:18,018 INFO L226 Difference]: Without dead ends: 12515 [2021-07-13 19:15:18,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-07-13 19:15:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-07-13 19:15:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-07-13 19:15:18,294 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-07-13 19:15:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:18,295 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-07-13 19:15:18,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-07-13 19:15:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:18,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:18,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:18,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:18,548 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-07-13 19:15:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:18,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810324559] [2021-07-13 19:15:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:18,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810324559] [2021-07-13 19:15:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810324559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909344160] [2021-07-13 19:15:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:18,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:15:18,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909344160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:18,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:18,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362759211] [2021-07-13 19:15:18,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:18,879 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:19,200 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-07-13 19:15:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:19,245 INFO L225 Difference]: With dead ends: 12816 [2021-07-13 19:15:19,246 INFO L226 Difference]: Without dead ends: 12786 [2021-07-13 19:15:19,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-07-13 19:15:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-07-13 19:15:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-07-13 19:15:19,508 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-07-13 19:15:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:19,508 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-07-13 19:15:19,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-07-13 19:15:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:19,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:19,531 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:19,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-13 19:15:19,732 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-07-13 19:15:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915394265] [2021-07-13 19:15:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:19,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:19,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915394265] [2021-07-13 19:15:19,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915394265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917398624] [2021-07-13 19:15:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:19,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:19,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:19,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917398624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:19,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092187281] [2021-07-13 19:15:19,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:19,989 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:20,320 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-07-13 19:15:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:20,364 INFO L225 Difference]: With dead ends: 12669 [2021-07-13 19:15:20,364 INFO L226 Difference]: Without dead ends: 12631 [2021-07-13 19:15:20,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-07-13 19:15:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-07-13 19:15:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-07-13 19:15:20,648 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-07-13 19:15:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:20,648 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-07-13 19:15:20,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-07-13 19:15:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:20,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:20,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:20,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:20,870 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-07-13 19:15:20,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:20,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902773488] [2021-07-13 19:15:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:20,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902773488] [2021-07-13 19:15:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902773488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061500348] [2021-07-13 19:15:20,938 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:20,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:15:20,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:20,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061500348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:21,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:21,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983218264] [2021-07-13 19:15:21,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:21,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:21,120 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:21,439 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-07-13 19:15:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:21,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:21,474 INFO L225 Difference]: With dead ends: 12456 [2021-07-13 19:15:21,474 INFO L226 Difference]: Without dead ends: 12441 [2021-07-13 19:15:21,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:15:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-07-13 19:15:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-07-13 19:15:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-07-13 19:15:21,697 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-07-13 19:15:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:21,697 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-07-13 19:15:21,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-07-13 19:15:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:21,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:21,721 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:21,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:21,921 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-07-13 19:15:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:21,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544375192] [2021-07-13 19:15:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544375192] [2021-07-13 19:15:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544375192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492667179] [2021-07-13 19:15:21,993 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:22,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:22,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492667179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:22,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:22,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:22,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555308596] [2021-07-13 19:15:22,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:22,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:22,177 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:22,516 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-07-13 19:15:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:22,552 INFO L225 Difference]: With dead ends: 12934 [2021-07-13 19:15:22,552 INFO L226 Difference]: Without dead ends: 12890 [2021-07-13 19:15:22,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-07-13 19:15:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-07-13 19:15:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-07-13 19:15:22,761 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-07-13 19:15:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:22,761 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-07-13 19:15:22,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-07-13 19:15:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:22,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:22,784 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:22,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,985 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-07-13 19:15:22,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:22,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494198408] [2021-07-13 19:15:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494198408] [2021-07-13 19:15:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494198408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265346309] [2021-07-13 19:15:23,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:23,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265346309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579844068] [2021-07-13 19:15:23,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:23,209 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:23,503 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-07-13 19:15:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:23,541 INFO L225 Difference]: With dead ends: 12785 [2021-07-13 19:15:23,542 INFO L226 Difference]: Without dead ends: 12687 [2021-07-13 19:15:23,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-07-13 19:15:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-07-13 19:15:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-07-13 19:15:23,793 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-07-13 19:15:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:23,794 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-07-13 19:15:23,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-07-13 19:15:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:23,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:23,817 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:24,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:24,018 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-07-13 19:15:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:24,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969244675] [2021-07-13 19:15:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:24,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:24,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969244675] [2021-07-13 19:15:24,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969244675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:24,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029818731] [2021-07-13 19:15:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:24,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:24,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:24,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:24,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029818731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:24,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:24,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:24,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783099696] [2021-07-13 19:15:24,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:24,242 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:24,561 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-07-13 19:15:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:24,596 INFO L225 Difference]: With dead ends: 12574 [2021-07-13 19:15:24,597 INFO L226 Difference]: Without dead ends: 12552 [2021-07-13 19:15:24,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:15:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-07-13 19:15:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-07-13 19:15:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-07-13 19:15:24,822 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-07-13 19:15:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:24,822 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-07-13 19:15:24,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-07-13 19:15:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:24,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:24,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:25,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 19:15:25,046 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-07-13 19:15:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:25,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899780423] [2021-07-13 19:15:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:25,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899780423] [2021-07-13 19:15:25,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899780423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581813129] [2021-07-13 19:15:25,108 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:25,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:15:25,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:25,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:25,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:25,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581813129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:25,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:25,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:25,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892669480] [2021-07-13 19:15:25,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:25,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:25,298 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:25,577 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-07-13 19:15:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:25,613 INFO L225 Difference]: With dead ends: 13084 [2021-07-13 19:15:25,613 INFO L226 Difference]: Without dead ends: 13054 [2021-07-13 19:15:25,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-07-13 19:15:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-07-13 19:15:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-07-13 19:15:25,909 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-07-13 19:15:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:25,909 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-07-13 19:15:25,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-07-13 19:15:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:25,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:25,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:26,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:15:26,133 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-07-13 19:15:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878045663] [2021-07-13 19:15:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:26,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878045663] [2021-07-13 19:15:26,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878045663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678373484] [2021-07-13 19:15:26,213 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:26,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:26,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678373484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:26,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:26,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697595264] [2021-07-13 19:15:26,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:26,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:26,368 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:26,611 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-07-13 19:15:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:26,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:26,645 INFO L225 Difference]: With dead ends: 12896 [2021-07-13 19:15:26,645 INFO L226 Difference]: Without dead ends: 12812 [2021-07-13 19:15:26,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-07-13 19:15:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-07-13 19:15:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-07-13 19:15:26,865 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-07-13 19:15:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-07-13 19:15:26,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-07-13 19:15:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:26,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:26,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:27,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:27,088 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-07-13 19:15:27,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:27,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732269673] [2021-07-13 19:15:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:27,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732269673] [2021-07-13 19:15:27,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732269673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628383668] [2021-07-13 19:15:27,158 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:27,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:27,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628383668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:27,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162108143] [2021-07-13 19:15:27,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:27,362 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:27,709 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-07-13 19:15:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:27,752 INFO L225 Difference]: With dead ends: 12969 [2021-07-13 19:15:27,753 INFO L226 Difference]: Without dead ends: 12939 [2021-07-13 19:15:27,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-07-13 19:15:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-07-13 19:15:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-07-13 19:15:28,004 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-07-13 19:15:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:28,004 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-07-13 19:15:28,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-07-13 19:15:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:28,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:28,030 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:28,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,230 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-07-13 19:15:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:28,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053165836] [2021-07-13 19:15:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:28,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053165836] [2021-07-13 19:15:28,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053165836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043303349] [2021-07-13 19:15:28,298 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:15:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043303349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:28,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:28,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141853476] [2021-07-13 19:15:28,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:28,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:28,465 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:28,781 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-07-13 19:15:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:28,827 INFO L225 Difference]: With dead ends: 13017 [2021-07-13 19:15:28,827 INFO L226 Difference]: Without dead ends: 12987 [2021-07-13 19:15:28,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-07-13 19:15:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-07-13 19:15:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-07-13 19:15:29,086 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-07-13 19:15:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:29,086 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-07-13 19:15:29,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-07-13 19:15:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:29,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:29,115 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:29,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:29,316 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-07-13 19:15:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:29,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559193513] [2021-07-13 19:15:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:29,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559193513] [2021-07-13 19:15:29,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559193513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609597202] [2021-07-13 19:15:29,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:29,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609597202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:29,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031117257] [2021-07-13 19:15:29,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:29,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:29,647 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:29,955 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-07-13 19:15:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:29,997 INFO L225 Difference]: With dead ends: 13031 [2021-07-13 19:15:29,997 INFO L226 Difference]: Without dead ends: 12951 [2021-07-13 19:15:29,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-07-13 19:15:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-07-13 19:15:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-07-13 19:15:30,270 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-07-13 19:15:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:30,270 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-07-13 19:15:30,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-07-13 19:15:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:15:30,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:30,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:30,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:30,499 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-07-13 19:15:30,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:30,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231108644] [2021-07-13 19:15:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:30,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:30,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231108644] [2021-07-13 19:15:30,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231108644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888585545] [2021-07-13 19:15:30,568 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:30,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:30,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888585545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:30,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:30,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552574253] [2021-07-13 19:15:30,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:30,785 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:31,169 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-07-13 19:15:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:15:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:15:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:31,207 INFO L225 Difference]: With dead ends: 12828 [2021-07-13 19:15:31,207 INFO L226 Difference]: Without dead ends: 12813 [2021-07-13 19:15:31,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:15:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-07-13 19:15:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-07-13 19:15:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-07-13 19:15:31,456 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-07-13 19:15:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:31,456 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-07-13 19:15:31,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-07-13 19:15:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:31,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:31,481 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:31,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:31,682 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-07-13 19:15:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:31,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240975792] [2021-07-13 19:15:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:31,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:31,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240975792] [2021-07-13 19:15:31,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240975792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116931093] [2021-07-13 19:15:31,718 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:31,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:31,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:15:31,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116931093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:31,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482467408] [2021-07-13 19:15:31,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:31,820 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:32,357 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-07-13 19:15:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:15:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-07-13 19:15:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:32,421 INFO L225 Difference]: With dead ends: 22245 [2021-07-13 19:15:32,421 INFO L226 Difference]: Without dead ends: 22157 [2021-07-13 19:15:32,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:15:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-07-13 19:15:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-07-13 19:15:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-07-13 19:15:32,918 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-07-13 19:15:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-07-13 19:15:32,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-07-13 19:15:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:32,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:32,951 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:33,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:33,152 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-07-13 19:15:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:33,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682940284] [2021-07-13 19:15:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:33,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682940284] [2021-07-13 19:15:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682940284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018713701] [2021-07-13 19:15:33,186 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:33,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:33,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018713701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:33,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:15:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887086831] [2021-07-13 19:15:33,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:33,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:33,280 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:33,547 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-07-13 19:15:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:15:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 29 [2021-07-13 19:15:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:33,604 INFO L225 Difference]: With dead ends: 20503 [2021-07-13 19:15:33,604 INFO L226 Difference]: Without dead ends: 20406 [2021-07-13 19:15:33,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-07-13 19:15:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-07-13 19:15:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-07-13 19:15:34,015 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-07-13 19:15:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:34,015 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-07-13 19:15:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-07-13 19:15:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:34,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:34,052 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:34,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:34,252 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-07-13 19:15:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854105132] [2021-07-13 19:15:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:15:34,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854105132] [2021-07-13 19:15:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854105132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194357202] [2021-07-13 19:15:34,282 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:34,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:15:34,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194357202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:34,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:15:34,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824521456] [2021-07-13 19:15:34,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:34,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:34,362 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:35,074 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-07-13 19:15:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:15:35,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 29 [2021-07-13 19:15:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:35,212 INFO L225 Difference]: With dead ends: 41463 [2021-07-13 19:15:35,213 INFO L226 Difference]: Without dead ends: 40731 [2021-07-13 19:15:35,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:15:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-07-13 19:15:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-07-13 19:15:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-07-13 19:15:36,246 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-07-13 19:15:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:36,246 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-07-13 19:15:36,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-07-13 19:15:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:36,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:36,313 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:36,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 19:15:36,514 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-07-13 19:15:36,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:36,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234616585] [2021-07-13 19:15:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:36,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234616585] [2021-07-13 19:15:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234616585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094221442] [2021-07-13 19:15:36,549 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:36,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:36,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094221442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:36,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:36,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616043862] [2021-07-13 19:15:36,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:36,648 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:37,712 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-07-13 19:15:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:15:37,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-07-13 19:15:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:37,927 INFO L225 Difference]: With dead ends: 54693 [2021-07-13 19:15:37,927 INFO L226 Difference]: Without dead ends: 54103 [2021-07-13 19:15:37,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:15:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-07-13 19:15:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-07-13 19:15:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-07-13 19:15:39,566 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-07-13 19:15:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:39,567 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-07-13 19:15:39,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-07-13 19:15:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:39,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:39,779 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:39,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:39,997 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-07-13 19:15:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778622257] [2021-07-13 19:15:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:40,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:40,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778622257] [2021-07-13 19:15:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778622257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:40,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278662403] [2021-07-13 19:15:40,039 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:40,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:40,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278662403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:40,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:40,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-07-13 19:15:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432721677] [2021-07-13 19:15:40,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:40,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:40,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:40,103 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:40,528 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-07-13 19:15:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 29 [2021-07-13 19:15:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:40,685 INFO L225 Difference]: With dead ends: 41400 [2021-07-13 19:15:40,685 INFO L226 Difference]: Without dead ends: 41184 [2021-07-13 19:15:40,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-07-13 19:15:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-07-13 19:15:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-07-13 19:15:41,889 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-07-13 19:15:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:41,889 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-07-13 19:15:41,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-07-13 19:15:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:42,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:42,185 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:42,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:15:42,401 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-07-13 19:15:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:42,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419532874] [2021-07-13 19:15:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:42,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419532874] [2021-07-13 19:15:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419532874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312149467] [2021-07-13 19:15:42,426 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:42,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:42,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312149467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:42,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:15:42,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833417173] [2021-07-13 19:15:42,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:42,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:42,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:42,521 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:43,862 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-07-13 19:15:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:15:43,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-07-13 19:15:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:44,267 INFO L225 Difference]: With dead ends: 60231 [2021-07-13 19:15:44,268 INFO L226 Difference]: Without dead ends: 59842 [2021-07-13 19:15:44,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 525.0ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:15:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-07-13 19:15:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-07-13 19:15:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-07-13 19:15:45,955 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-07-13 19:15:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:45,955 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-07-13 19:15:45,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-07-13 19:15:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:46,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:46,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:46,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:46,553 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-07-13 19:15:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:46,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495665693] [2021-07-13 19:15:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:46,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:46,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495665693] [2021-07-13 19:15:46,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495665693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042429592] [2021-07-13 19:15:46,575 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:46,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:15:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:46,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042429592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:46,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:15:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251758630] [2021-07-13 19:15:46,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:46,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:46,662 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,124 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-07-13 19:15:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:15:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2021-07-13 19:15:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,416 INFO L225 Difference]: With dead ends: 61448 [2021-07-13 19:15:48,416 INFO L226 Difference]: Without dead ends: 61268 [2021-07-13 19:15:48,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:15:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-07-13 19:15:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-07-13 19:15:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-07-13 19:15:50,453 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-07-13 19:15:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,453 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-07-13 19:15:50,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-07-13 19:15:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:50,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,551 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:15:50,752 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-07-13 19:15:50,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116396868] [2021-07-13 19:15:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:50,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116396868] [2021-07-13 19:15:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116396868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326070462] [2021-07-13 19:15:50,772 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:50,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:50,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:15:50,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326070462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:50,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:50,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:15:50,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699990310] [2021-07-13 19:15:50,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,847 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,628 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-07-13 19:15:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 29 [2021-07-13 19:15:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,873 INFO L225 Difference]: With dead ends: 58737 [2021-07-13 19:15:51,873 INFO L226 Difference]: Without dead ends: 58715 [2021-07-13 19:15:51,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:15:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-07-13 19:15:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-07-13 19:15:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-07-13 19:15:54,010 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-07-13 19:15:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,010 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-07-13 19:15:54,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-07-13 19:15:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:54,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:15:54,336 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-07-13 19:15:54,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823102775] [2021-07-13 19:15:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:54,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823102775] [2021-07-13 19:15:54,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823102775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917553960] [2021-07-13 19:15:54,372 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:54,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:54,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917553960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:54,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:15:54,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377430610] [2021-07-13 19:15:54,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:54,465 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:56,255 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-07-13 19:15:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 19:15:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-07-13 19:15:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:56,616 INFO L225 Difference]: With dead ends: 79748 [2021-07-13 19:15:56,616 INFO L226 Difference]: Without dead ends: 79619 [2021-07-13 19:15:56,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 19:15:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-07-13 19:15:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-07-13 19:15:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-07-13 19:15:59,226 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-07-13 19:15:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:59,226 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-07-13 19:15:59,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-07-13 19:15:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:15:59,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:59,343 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:59,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:15:59,543 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-07-13 19:15:59,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:59,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495930253] [2021-07-13 19:15:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:59,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:59,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495930253] [2021-07-13 19:15:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495930253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694326230] [2021-07-13 19:15:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:59,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:15:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:59,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694326230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:59,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-07-13 19:15:59,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640846890] [2021-07-13 19:15:59,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:59,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:59,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:59,664 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:00,382 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-07-13 19:16:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 29 [2021-07-13 19:16:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:00,650 INFO L225 Difference]: With dead ends: 60437 [2021-07-13 19:16:00,651 INFO L226 Difference]: Without dead ends: 60405 [2021-07-13 19:16:00,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-07-13 19:16:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-07-13 19:16:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-07-13 19:16:02,597 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-07-13 19:16:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,597 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-07-13 19:16:02,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-07-13 19:16:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:02,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:02,900 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-07-13 19:16:02,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356667505] [2021-07-13 19:16:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:02,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356667505] [2021-07-13 19:16:02,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356667505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276425750] [2021-07-13 19:16:02,924 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276425750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-13 19:16:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909654334] [2021-07-13 19:16:02,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:02,990 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:03,749 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-07-13 19:16:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-07-13 19:16:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:03,992 INFO L225 Difference]: With dead ends: 60595 [2021-07-13 19:16:03,993 INFO L226 Difference]: Without dead ends: 60532 [2021-07-13 19:16:03,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-07-13 19:16:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-07-13 19:16:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-07-13 19:16:06,002 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-07-13 19:16:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:06,003 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-07-13 19:16:06,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-07-13 19:16:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:06,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:06,152 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:06,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 19:16:06,354 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-07-13 19:16:06,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:06,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260743401] [2021-07-13 19:16:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:06,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260743401] [2021-07-13 19:16:06,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260743401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030864577] [2021-07-13 19:16:06,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:06,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:06,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030864577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:06,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:16:06,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270708744] [2021-07-13 19:16:06,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:06,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:06,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:06,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:06,462 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:07,759 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-07-13 19:16:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 19:16:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 29 [2021-07-13 19:16:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:08,047 INFO L225 Difference]: With dead ends: 66898 [2021-07-13 19:16:08,047 INFO L226 Difference]: Without dead ends: 66524 [2021-07-13 19:16:08,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:16:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-07-13 19:16:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-07-13 19:16:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-07-13 19:16:10,029 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-07-13 19:16:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,030 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-07-13 19:16:10,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-07-13 19:16:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:10,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:10,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:10,336 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-07-13 19:16:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:10,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733133603] [2021-07-13 19:16:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:10,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:10,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733133603] [2021-07-13 19:16:10,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733133603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637549174] [2021-07-13 19:16:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:10,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637549174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:10,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:16:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287307936] [2021-07-13 19:16:10,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:10,450 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:12,175 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-07-13 19:16:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:16:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 29 [2021-07-13 19:16:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:12,699 INFO L225 Difference]: With dead ends: 100609 [2021-07-13 19:16:12,699 INFO L226 Difference]: Without dead ends: 100210 [2021-07-13 19:16:12,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:16:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-07-13 19:16:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-07-13 19:16:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-07-13 19:16:15,811 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-07-13 19:16:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:15,811 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-07-13 19:16:15,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-07-13 19:16:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:15,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:15,992 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:16,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:16:16,197 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-07-13 19:16:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752552753] [2021-07-13 19:16:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:16,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752552753] [2021-07-13 19:16:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752552753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023138777] [2021-07-13 19:16:16,221 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:16,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023138777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:16:16,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35458413] [2021-07-13 19:16:16,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:16,303 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,345 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-07-13 19:16:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 19:16:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-07-13 19:16:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,894 INFO L225 Difference]: With dead ends: 102298 [2021-07-13 19:16:18,894 INFO L226 Difference]: Without dead ends: 101158 [2021-07-13 19:16:18,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:16:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-07-13 19:16:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-07-13 19:16:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-07-13 19:16:22,046 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-07-13 19:16:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:22,046 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-07-13 19:16:22,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-07-13 19:16:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:22,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:22,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:22,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:22,412 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-07-13 19:16:22,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:22,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153978059] [2021-07-13 19:16:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:22,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:22,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153978059] [2021-07-13 19:16:22,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153978059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748340984] [2021-07-13 19:16:22,443 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:22,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:16:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:22,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748340984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:22,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:16:22,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250151419] [2021-07-13 19:16:22,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:22,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:22,518 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:23,765 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-07-13 19:16:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 29 [2021-07-13 19:16:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:24,359 INFO L225 Difference]: With dead ends: 82707 [2021-07-13 19:16:24,360 INFO L226 Difference]: Without dead ends: 82617 [2021-07-13 19:16:24,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-07-13 19:16:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-07-13 19:16:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-07-13 19:16:26,758 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-07-13 19:16:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:26,758 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-07-13 19:16:26,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-07-13 19:16:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:26,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:26,913 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:27,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:27,114 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-07-13 19:16:27,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:27,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603513941] [2021-07-13 19:16:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:27,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603513941] [2021-07-13 19:16:27,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603513941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277576121] [2021-07-13 19:16:27,142 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:27,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:27,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:27,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:27,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277576121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:27,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:16:27,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354858853] [2021-07-13 19:16:27,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:27,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:27,610 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:29,155 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-07-13 19:16:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 19:16:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-07-13 19:16:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:29,530 INFO L225 Difference]: With dead ends: 90454 [2021-07-13 19:16:29,530 INFO L226 Difference]: Without dead ends: 89724 [2021-07-13 19:16:29,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 918.2ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:16:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-07-13 19:16:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-07-13 19:16:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-07-13 19:16:31,965 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-07-13 19:16:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:31,965 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-07-13 19:16:31,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-07-13 19:16:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:32,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:32,525 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-07-13 19:16:32,725 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-07-13 19:16:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737479802] [2021-07-13 19:16:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:32,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737479802] [2021-07-13 19:16:32,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737479802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654550291] [2021-07-13 19:16:32,753 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654550291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:32,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742785678] [2021-07-13 19:16:32,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:32,811 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:33,841 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-07-13 19:16:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-07-13 19:16:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:34,257 INFO L225 Difference]: With dead ends: 85882 [2021-07-13 19:16:34,258 INFO L226 Difference]: Without dead ends: 85852 [2021-07-13 19:16:34,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-07-13 19:16:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-07-13 19:16:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-07-13 19:16:36,837 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-07-13 19:16:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:36,837 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-07-13 19:16:36,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-07-13 19:16:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:37,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:37,005 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:37,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 19:16:37,206 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-07-13 19:16:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:37,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697325309] [2021-07-13 19:16:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:37,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697325309] [2021-07-13 19:16:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697325309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080815970] [2021-07-13 19:16:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:37,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080815970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:37,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:37,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940289226] [2021-07-13 19:16:37,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:37,292 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:38,320 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-07-13 19:16:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-07-13 19:16:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:39,055 INFO L225 Difference]: With dead ends: 90964 [2021-07-13 19:16:39,055 INFO L226 Difference]: Without dead ends: 90951 [2021-07-13 19:16:39,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-07-13 19:16:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-07-13 19:16:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-07-13 19:16:41,726 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-07-13 19:16:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-07-13 19:16:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-07-13 19:16:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:41,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:41,878 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:42,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:42,079 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-07-13 19:16:42,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:42,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412800197] [2021-07-13 19:16:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:42,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:42,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412800197] [2021-07-13 19:16:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412800197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514365398] [2021-07-13 19:16:42,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:42,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:16:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514365398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:42,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:16:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285575903] [2021-07-13 19:16:42,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:42,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:42,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:42,213 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:44,275 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-07-13 19:16:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 19:16:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2021-07-13 19:16:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:44,818 INFO L225 Difference]: With dead ends: 117029 [2021-07-13 19:16:44,819 INFO L226 Difference]: Without dead ends: 116821 [2021-07-13 19:16:44,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 936.2ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:16:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-07-13 19:16:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-07-13 19:16:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-07-13 19:16:48,120 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-07-13 19:16:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:48,120 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-07-13 19:16:48,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-07-13 19:16:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:48,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:48,284 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:48,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:16:48,484 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-07-13 19:16:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:48,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231396537] [2021-07-13 19:16:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:48,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231396537] [2021-07-13 19:16:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231396537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429333579] [2021-07-13 19:16:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:49,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:49,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429333579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:49,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:16:49,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122831782] [2021-07-13 19:16:49,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:49,055 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:49,702 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-07-13 19:16:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 29 [2021-07-13 19:16:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:50,343 INFO L225 Difference]: With dead ends: 86807 [2021-07-13 19:16:50,343 INFO L226 Difference]: Without dead ends: 86624 [2021-07-13 19:16:50,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-07-13 19:16:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-07-13 19:16:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-07-13 19:16:52,949 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-07-13 19:16:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:52,949 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-07-13 19:16:52,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-07-13 19:16:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:53,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:53,112 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:53,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:16:53,313 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-07-13 19:16:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:53,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704617539] [2021-07-13 19:16:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:53,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:53,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704617539] [2021-07-13 19:16:53,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704617539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658336988] [2021-07-13 19:16:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:53,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:53,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658336988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:53,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 19:16:53,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459024855] [2021-07-13 19:16:53,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:53,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:53,457 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,940 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-07-13 19:16:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:54,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 29 [2021-07-13 19:16:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,787 INFO L225 Difference]: With dead ends: 105120 [2021-07-13 19:16:55,787 INFO L226 Difference]: Without dead ends: 104966 [2021-07-13 19:16:55,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-07-13 19:16:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-07-13 19:16:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-07-13 19:16:59,112 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-07-13 19:16:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,112 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-07-13 19:16:59,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-07-13 19:16:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:16:59,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,313 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:59,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:16:59,514 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-07-13 19:16:59,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:59,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985355677] [2021-07-13 19:16:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:59,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:59,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985355677] [2021-07-13 19:16:59,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985355677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471915872] [2021-07-13 19:16:59,558 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 [2021-07-13 19:16:59,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:59,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:16:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:59,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471915872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-07-13 19:16:59,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382885536] [2021-07-13 19:16:59,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:59,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:59,654 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,513 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:17:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,945 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-07-13 19:17:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 19:17:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-07-13 19:17:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,930 INFO L225 Difference]: With dead ends: 124333 [2021-07-13 19:17:02,931 INFO L226 Difference]: Without dead ends: 124126 [2021-07-13 19:17:02,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1000.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 19:17:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-07-13 19:17:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-07-13 19:17:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-07-13 19:17:06,237 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-07-13 19:17:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,237 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-07-13 19:17:06,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-07-13 19:17:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:06,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:06,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,629 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-07-13 19:17:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380562938] [2021-07-13 19:17:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:06,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:06,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380562938] [2021-07-13 19:17:06,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380562938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497697922] [2021-07-13 19:17:06,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:06,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497697922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:06,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-07-13 19:17:06,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744096030] [2021-07-13 19:17:06,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:06,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:06,750 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,911 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-07-13 19:17:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 29 [2021-07-13 19:17:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,419 INFO L225 Difference]: With dead ends: 104858 [2021-07-13 19:17:08,419 INFO L226 Difference]: Without dead ends: 104830 [2021-07-13 19:17:08,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-07-13 19:17:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-07-13 19:17:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-07-13 19:17:11,541 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-07-13 19:17:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-07-13 19:17:11,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-07-13 19:17:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:11,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:11,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:11,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 19:17:11,926 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-07-13 19:17:11,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:11,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826409041] [2021-07-13 19:17:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:11,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826409041] [2021-07-13 19:17:11,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826409041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333979896] [2021-07-13 19:17:11,956 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 [2021-07-13 19:17:11,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:12,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333979896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:12,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:17:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615783163] [2021-07-13 19:17:12,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:12,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:12,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:12,072 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:14,122 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-07-13 19:17:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:17:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 29 [2021-07-13 19:17:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:14,734 INFO L225 Difference]: With dead ends: 120372 [2021-07-13 19:17:14,734 INFO L226 Difference]: Without dead ends: 120022 [2021-07-13 19:17:14,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:17:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-07-13 19:17:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-07-13 19:17:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-07-13 19:17:18,308 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-07-13 19:17:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:18,308 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-07-13 19:17:18,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-07-13 19:17:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:19,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,039 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:19,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:17:19,239 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-07-13 19:17:19,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:19,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211003562] [2021-07-13 19:17:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211003562] [2021-07-13 19:17:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211003562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703586584] [2021-07-13 19:17:19,277 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 [2021-07-13 19:17:19,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:17:19,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703586584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:17:19,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848271432] [2021-07-13 19:17:19,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:19,390 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,599 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-07-13 19:17:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 19:17:21,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 29 [2021-07-13 19:17:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,464 INFO L225 Difference]: With dead ends: 158751 [2021-07-13 19:17:22,465 INFO L226 Difference]: Without dead ends: 157945 [2021-07-13 19:17:22,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:17:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-07-13 19:17:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-07-13 19:17:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-07-13 19:17:26,890 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-07-13 19:17:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,890 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-07-13 19:17:26,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-07-13 19:17:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:27,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,523 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,723 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-07-13 19:17:27,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023488418] [2021-07-13 19:17:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:27,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023488418] [2021-07-13 19:17:27,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023488418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991343732] [2021-07-13 19:17:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:27,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991343732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:17:27,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258240871] [2021-07-13 19:17:27,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:17:27,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:17:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:17:27,808 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:28,994 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-07-13 19:17:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 29 [2021-07-13 19:17:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:29,605 INFO L225 Difference]: With dead ends: 124805 [2021-07-13 19:17:29,605 INFO L226 Difference]: Without dead ends: 124469 [2021-07-13 19:17:29,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-07-13 19:17:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-07-13 19:17:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-07-13 19:17:33,900 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-07-13 19:17:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:33,900 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-07-13 19:17:33,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-07-13 19:17:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:34,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:34,581 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:34,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,782 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-07-13 19:17:34,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:34,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142713483] [2021-07-13 19:17:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:34,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:34,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142713483] [2021-07-13 19:17:34,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142713483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112423020] [2021-07-13 19:17:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:34,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:34,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112423020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:34,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:17:34,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482200772] [2021-07-13 19:17:34,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:17:34,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:34,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:17:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:17:34,884 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:36,076 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-07-13 19:17:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-07-13 19:17:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:36,730 INFO L225 Difference]: With dead ends: 131593 [2021-07-13 19:17:36,730 INFO L226 Difference]: Without dead ends: 131578 [2021-07-13 19:17:36,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-07-13 19:17:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-07-13 19:17:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-07-13 19:17:41,690 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-07-13 19:17:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:41,690 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-07-13 19:17:41,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-07-13 19:17:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:41,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:41,924 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:42,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,125 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-07-13 19:17:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:42,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105995325] [2021-07-13 19:17:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:42,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:42,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105995325] [2021-07-13 19:17:42,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105995325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784775837] [2021-07-13 19:17:42,153 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:42,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784775837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:42,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:17:42,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216767691] [2021-07-13 19:17:42,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:42,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:42,247 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:45,046 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-07-13 19:17:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 19:17:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 29 [2021-07-13 19:17:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:45,918 INFO L225 Difference]: With dead ends: 162417 [2021-07-13 19:17:45,918 INFO L226 Difference]: Without dead ends: 162210 [2021-07-13 19:17:45,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 19:17:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-07-13 19:17:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-07-13 19:17:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-07-13 19:17:50,527 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-07-13 19:17:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:50,527 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-07-13 19:17:50,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-07-13 19:17:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:51,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:51,233 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:51,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:51,434 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-07-13 19:17:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:51,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244101653] [2021-07-13 19:17:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:51,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244101653] [2021-07-13 19:17:51,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244101653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128211446] [2021-07-13 19:17:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:51,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:51,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128211446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:51,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:17:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583119800] [2021-07-13 19:17:51,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:17:51,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:17:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:17:51,513 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:52,793 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-07-13 19:17:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 29 [2021-07-13 19:17:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:53,856 INFO L225 Difference]: With dead ends: 135149 [2021-07-13 19:17:53,856 INFO L226 Difference]: Without dead ends: 135117 [2021-07-13 19:17:53,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-07-13 19:17:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-07-13 19:17:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-07-13 19:17:58,480 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-07-13 19:17:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:58,480 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-07-13 19:17:58,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-07-13 19:17:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:17:58,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:58,768 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:58,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 19:17:58,968 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-07-13 19:17:58,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:58,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208914870] [2021-07-13 19:17:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:58,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:58,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208914870] [2021-07-13 19:17:58,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208914870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925151091] [2021-07-13 19:17:58,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:59,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:59,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:59,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:59,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925151091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:59,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:17:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400669630] [2021-07-13 19:17:59,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:17:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:17:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:17:59,062 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,758 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-07-13 19:18:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 29 [2021-07-13 19:18:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,583 INFO L225 Difference]: With dead ends: 143528 [2021-07-13 19:18:01,583 INFO L226 Difference]: Without dead ends: 143516 [2021-07-13 19:18:01,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:18:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-07-13 19:18:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-07-13 19:18:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-07-13 19:18:06,346 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-07-13 19:18:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:06,346 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-07-13 19:18:06,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-07-13 19:18:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:18:07,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:07,109 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:07,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:18:07,333 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-07-13 19:18:07,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:07,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908656976] [2021-07-13 19:18:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:07,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:07,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908656976] [2021-07-13 19:18:07,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908656976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952245265] [2021-07-13 19:18:07,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:07,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:07,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:18:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:07,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952245265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:07,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 19:18:07,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172188271] [2021-07-13 19:18:07,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:18:07,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:07,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:18:07,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:18:07,440 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:09,125 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-07-13 19:18:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:18:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-07-13 19:18:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:11,079 INFO L225 Difference]: With dead ends: 158841 [2021-07-13 19:18:11,080 INFO L226 Difference]: Without dead ends: 158080 [2021-07-13 19:18:11,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:18:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-07-13 19:18:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-07-13 19:18:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-07-13 19:18:16,114 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-07-13 19:18:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:16,114 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-07-13 19:18:16,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-07-13 19:18:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:18:16,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:16,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:18:17,075 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-07-13 19:18:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971567920] [2021-07-13 19:18:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:17,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971567920] [2021-07-13 19:18:17,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971567920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910960945] [2021-07-13 19:18:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:17,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:18:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910960945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:17,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:18:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249050485] [2021-07-13 19:18:17,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:18:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:18:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:18:17,174 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:18,538 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-07-13 19:18:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 29 [2021-07-13 19:18:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:19,565 INFO L225 Difference]: With dead ends: 144032 [2021-07-13 19:18:19,565 INFO L226 Difference]: Without dead ends: 144002 [2021-07-13 19:18:19,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-07-13 19:18:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-07-13 19:18:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-07-13 19:18:24,226 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-07-13 19:18:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:24,226 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-07-13 19:18:24,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-07-13 19:18:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:18:24,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:24,520 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:24,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:24,723 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-07-13 19:18:24,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:24,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150971985] [2021-07-13 19:18:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:24,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:24,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150971985] [2021-07-13 19:18:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150971985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953299487] [2021-07-13 19:18:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:24,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:18:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:18:24,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:24,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953299487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:24,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:18:24,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153729021] [2021-07-13 19:18:24,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:18:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:18:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:18:24,835 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:26,553 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-07-13 19:18:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 29 [2021-07-13 19:18:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:27,294 INFO L225 Difference]: With dead ends: 143204 [2021-07-13 19:18:27,295 INFO L226 Difference]: Without dead ends: 143141 [2021-07-13 19:18:27,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-07-13 19:18:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-07-13 19:18:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-07-13 19:18:31,711 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-07-13 19:18:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:31,711 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-07-13 19:18:31,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-07-13 19:18:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:18:31,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:31,994 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:32,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 19:18:32,197 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-07-13 19:18:32,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:32,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247066261] [2021-07-13 19:18:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:32,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247066261] [2021-07-13 19:18:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247066261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494733422] [2021-07-13 19:18:32,224 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:32,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:18:32,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:18:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:32,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494733422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:32,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:18:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690764194] [2021-07-13 19:18:32,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:32,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:32,329 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,796 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 19:18:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:35,255 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-07-13 19:18:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:18:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 29 [2021-07-13 19:18:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:36,269 INFO L225 Difference]: With dead ends: 186865 [2021-07-13 19:18:36,270 INFO L226 Difference]: Without dead ends: 186574 [2021-07-13 19:18:36,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 961.0ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:18:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-07-13 19:18:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-07-13 19:18:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-07-13 19:18:41,734 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-07-13 19:18:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:41,734 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-07-13 19:18:41,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-07-13 19:18:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:18:42,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:42,002 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:42,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:42,202 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-07-13 19:18:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563214521] [2021-07-13 19:18:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563214521] [2021-07-13 19:18:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563214521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298736585] [2021-07-13 19:18:42,228 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:18:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:42,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298736585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:42,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:42,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:18:42,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848611669] [2021-07-13 19:18:42,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:18:42,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:18:42,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:18:42,293 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:44,103 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-07-13 19:18:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 29 [2021-07-13 19:18:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:45,494 INFO L225 Difference]: With dead ends: 140798 [2021-07-13 19:18:45,494 INFO L226 Difference]: Without dead ends: 140342 [2021-07-13 19:18:45,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-07-13 19:18:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-07-13 19:18:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-07-13 19:18:50,349 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-07-13 19:18:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:50,349 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-07-13 19:18:50,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-07-13 19:18:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:18:51,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:51,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:51,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 19:18:51,384 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-07-13 19:18:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:51,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531196598] [2021-07-13 19:18:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:51,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531196598] [2021-07-13 19:18:51,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531196598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270321794] [2021-07-13 19:18:51,499 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:18:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:51,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270321794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:51,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:18:51,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755785320] [2021-07-13 19:18:51,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:18:51,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:18:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:51,834 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:53,495 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-07-13 19:18:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:18:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:54,522 INFO L225 Difference]: With dead ends: 130957 [2021-07-13 19:18:54,522 INFO L226 Difference]: Without dead ends: 130942 [2021-07-13 19:18:54,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:18:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-07-13 19:18:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-07-13 19:18:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-07-13 19:18:58,939 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-07-13 19:18:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:58,939 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-07-13 19:18:58,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-07-13 19:18:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:18:59,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:59,292 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:59,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:59,493 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:59,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-07-13 19:18:59,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:59,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652835126] [2021-07-13 19:18:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:59,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652835126] [2021-07-13 19:18:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652835126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732580903] [2021-07-13 19:18:59,600 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:59,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:59,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:18:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732580903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:59,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:59,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:18:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683178736] [2021-07-13 19:18:59,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:18:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:18:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:59,890 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:01,718 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-07-13 19:19:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:02,370 INFO L225 Difference]: With dead ends: 131223 [2021-07-13 19:19:02,370 INFO L226 Difference]: Without dead ends: 131110 [2021-07-13 19:19:02,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-07-13 19:19:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-07-13 19:19:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-07-13 19:19:06,786 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-07-13 19:19:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-07-13 19:19:06,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-07-13 19:19:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:07,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:07,115 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:07,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-07-13 19:19:07,317 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-07-13 19:19:07,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:07,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138786286] [2021-07-13 19:19:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:07,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:07,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138786286] [2021-07-13 19:19:07,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138786286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:07,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635862659] [2021-07-13 19:19:07,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:07,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:07,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:08,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635862659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:08,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022896055] [2021-07-13 19:19:08,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:08,153 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:09,545 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-07-13 19:19:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:10,594 INFO L225 Difference]: With dead ends: 131397 [2021-07-13 19:19:10,594 INFO L226 Difference]: Without dead ends: 131308 [2021-07-13 19:19:10,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 786.6ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-07-13 19:19:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-07-13 19:19:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-07-13 19:19:15,069 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-07-13 19:19:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:15,069 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-07-13 19:19:15,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-07-13 19:19:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:15,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:15,416 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:15,616 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-07-13 19:19:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703192371] [2021-07-13 19:19:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:15,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703192371] [2021-07-13 19:19:15,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703192371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40915966] [2021-07-13 19:19:15,738 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:15,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:15,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:16,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40915966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:16,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:16,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:16,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083998291] [2021-07-13 19:19:16,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:16,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:16,077 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:17,950 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-07-13 19:19:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:19,173 INFO L225 Difference]: With dead ends: 131417 [2021-07-13 19:19:19,174 INFO L226 Difference]: Without dead ends: 131387 [2021-07-13 19:19:19,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-07-13 19:19:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-07-13 19:19:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-07-13 19:19:23,723 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-07-13 19:19:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:23,723 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-07-13 19:19:23,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-07-13 19:19:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:24,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:24,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:24,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 19:19:24,298 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-07-13 19:19:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:24,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400635000] [2021-07-13 19:19:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:24,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400635000] [2021-07-13 19:19:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400635000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058686551] [2021-07-13 19:19:24,403 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:24,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:19:24,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058686551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308713487] [2021-07-13 19:19:24,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:24,697 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:26,477 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-07-13 19:19:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:27,164 INFO L225 Difference]: With dead ends: 131430 [2021-07-13 19:19:27,164 INFO L226 Difference]: Without dead ends: 131346 [2021-07-13 19:19:27,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-07-13 19:19:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-07-13 19:19:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-07-13 19:19:31,660 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-07-13 19:19:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-07-13 19:19:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-07-13 19:19:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:32,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:32,007 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:32,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:19:32,207 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-07-13 19:19:32,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:32,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220646895] [2021-07-13 19:19:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220646895] [2021-07-13 19:19:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220646895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147039923] [2021-07-13 19:19:32,322 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:32,784 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:19:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:33,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147039923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:33,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:33,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43713790] [2021-07-13 19:19:33,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:33,021 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:34,386 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-07-13 19:19:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:35,403 INFO L225 Difference]: With dead ends: 131646 [2021-07-13 19:19:35,403 INFO L226 Difference]: Without dead ends: 131557 [2021-07-13 19:19:35,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 728.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-07-13 19:19:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-07-13 19:19:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-07-13 19:19:39,884 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-07-13 19:19:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:39,885 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-07-13 19:19:39,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-07-13 19:19:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:40,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:40,258 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:40,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:19:40,458 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-07-13 19:19:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438012496] [2021-07-13 19:19:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:40,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438012496] [2021-07-13 19:19:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438012496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085741456] [2021-07-13 19:19:40,555 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:40,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:40,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085741456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:40,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081488249] [2021-07-13 19:19:40,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:40,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:40,823 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:42,607 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-07-13 19:19:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:43,320 INFO L225 Difference]: With dead ends: 131828 [2021-07-13 19:19:43,320 INFO L226 Difference]: Without dead ends: 131717 [2021-07-13 19:19:43,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-07-13 19:19:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-07-13 19:19:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-07-13 19:19:47,889 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-07-13 19:19:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:47,890 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-07-13 19:19:47,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-07-13 19:19:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:48,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:48,710 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:48,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:48,934 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-07-13 19:19:48,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:48,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209803437] [2021-07-13 19:19:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:49,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209803437] [2021-07-13 19:19:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209803437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968524710] [2021-07-13 19:19:49,051 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:49,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:19:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:49,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968524710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:49,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:49,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710932488] [2021-07-13 19:19:49,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:49,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:49,426 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:51,106 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-07-13 19:19:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:52,442 INFO L225 Difference]: With dead ends: 131995 [2021-07-13 19:19:52,442 INFO L226 Difference]: Without dead ends: 131906 [2021-07-13 19:19:52,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-07-13 19:19:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-07-13 19:19:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-07-13 19:19:56,969 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-07-13 19:19:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:56,970 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-07-13 19:19:56,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-07-13 19:19:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:57,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:57,349 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:57,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:57,550 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:57,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-07-13 19:19:57,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:57,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634447540] [2021-07-13 19:19:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:57,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:57,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634447540] [2021-07-13 19:19:57,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634447540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951455461] [2021-07-13 19:19:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:57,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:19:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:57,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951455461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:19:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327191412] [2021-07-13 19:19:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:57,933 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:59,782 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-07-13 19:19:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:00,455 INFO L225 Difference]: With dead ends: 132177 [2021-07-13 19:20:00,455 INFO L226 Difference]: Without dead ends: 132066 [2021-07-13 19:20:00,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:20:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-07-13 19:20:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-07-13 19:20:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-07-13 19:20:05,098 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-07-13 19:20:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:05,098 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-07-13 19:20:05,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-07-13 19:20:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:05,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:05,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:06,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:20:06,189 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-07-13 19:20:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:06,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699148766] [2021-07-13 19:20:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:06,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:06,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699148766] [2021-07-13 19:20:06,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699148766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:06,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846627267] [2021-07-13 19:20:06,291 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:06,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:20:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846627267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:06,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:06,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:06,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284689965] [2021-07-13 19:20:06,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:06,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:06,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:06,546 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:08,074 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-07-13 19:20:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:20:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:09,111 INFO L225 Difference]: With dead ends: 132137 [2021-07-13 19:20:09,111 INFO L226 Difference]: Without dead ends: 132107 [2021-07-13 19:20:09,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:20:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-07-13 19:20:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-07-13 19:20:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-07-13 19:20:13,799 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-07-13 19:20:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:13,799 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-07-13 19:20:13,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-07-13 19:20:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:14,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:14,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:14,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 19:20:14,334 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-07-13 19:20:14,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:14,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546152313] [2021-07-13 19:20:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546152313] [2021-07-13 19:20:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546152313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840123723] [2021-07-13 19:20:14,436 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:14,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:20:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840123723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:15,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:15,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:15,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209605554] [2021-07-13 19:20:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:15,052 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:16,561 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-07-13 19:20:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:20:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:17,581 INFO L225 Difference]: With dead ends: 132172 [2021-07-13 19:20:17,581 INFO L226 Difference]: Without dead ends: 132142 [2021-07-13 19:20:17,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-07-13 19:20:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-07-13 19:20:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-07-13 19:20:21,601 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-07-13 19:20:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:21,601 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-07-13 19:20:21,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-07-13 19:20:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:22,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:22,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:22,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:22,844 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-07-13 19:20:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020508941] [2021-07-13 19:20:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:23,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:23,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020508941] [2021-07-13 19:20:23,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020508941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263499644] [2021-07-13 19:20:23,015 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:23,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263499644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:23,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:23,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211403625] [2021-07-13 19:20:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:23,337 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:25,154 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-07-13 19:20:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:26,386 INFO L225 Difference]: With dead ends: 132329 [2021-07-13 19:20:26,386 INFO L226 Difference]: Without dead ends: 132261 [2021-07-13 19:20:26,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-07-13 19:20:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-07-13 19:20:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-07-13 19:20:30,885 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-07-13 19:20:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:30,885 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-07-13 19:20:30,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-07-13 19:20:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:31,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:31,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:31,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:31,460 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-07-13 19:20:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680992883] [2021-07-13 19:20:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:31,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:31,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680992883] [2021-07-13 19:20:31,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680992883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305109383] [2021-07-13 19:20:31,562 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:31,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:31,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305109383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:31,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976012592] [2021-07-13 19:20:31,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:31,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:31,808 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:33,591 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-07-13 19:20:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:34,290 INFO L225 Difference]: With dead ends: 132441 [2021-07-13 19:20:34,290 INFO L226 Difference]: Without dead ends: 132361 [2021-07-13 19:20:34,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-07-13 19:20:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-07-13 19:20:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-07-13 19:20:38,820 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-07-13 19:20:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:38,820 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-07-13 19:20:38,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-07-13 19:20:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:39,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:39,155 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:39,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:39,356 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-07-13 19:20:39,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:39,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783929901] [2021-07-13 19:20:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:39,822 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:20:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:39,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:39,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783929901] [2021-07-13 19:20:39,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783929901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832853041] [2021-07-13 19:20:39,856 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:39,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:20:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:40,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832853041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:40,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:40,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:40,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621113662] [2021-07-13 19:20:40,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:40,164 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:41,517 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-07-13 19:20:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:42,532 INFO L225 Difference]: With dead ends: 132789 [2021-07-13 19:20:42,532 INFO L226 Difference]: Without dead ends: 132700 [2021-07-13 19:20:42,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-07-13 19:20:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-07-13 19:20:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-07-13 19:20:47,119 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-07-13 19:20:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-07-13 19:20:47,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-07-13 19:20:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:47,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:47,481 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:47,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-07-13 19:20:47,681 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-07-13 19:20:47,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:47,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404942293] [2021-07-13 19:20:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:47,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404942293] [2021-07-13 19:20:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404942293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267861598] [2021-07-13 19:20:47,782 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 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 [2021-07-13 19:20:47,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:47,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:47,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:48,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267861598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:48,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:48,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591628484] [2021-07-13 19:20:48,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:48,028 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:48,402 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-07-13 19:20:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:49,778 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-07-13 19:20:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:50,469 INFO L225 Difference]: With dead ends: 132973 [2021-07-13 19:20:50,470 INFO L226 Difference]: Without dead ends: 132862 [2021-07-13 19:20:50,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-07-13 19:20:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-07-13 19:20:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-07-13 19:20:55,701 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-07-13 19:20:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-07-13 19:20:55,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-07-13 19:20:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:56,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:56,486 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:56,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:20:56,687 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-07-13 19:20:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:56,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285431661] [2021-07-13 19:20:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285431661] [2021-07-13 19:20:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285431661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:56,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442026347] [2021-07-13 19:20:56,783 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:56,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:20:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:20:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442026347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:57,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:57,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:20:57,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871431533] [2021-07-13 19:20:57,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:57,046 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:58,805 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-07-13 19:20:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:58,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:20:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:59,476 INFO L225 Difference]: With dead ends: 133313 [2021-07-13 19:20:59,476 INFO L226 Difference]: Without dead ends: 133267 [2021-07-13 19:20:59,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-07-13 19:21:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-07-13 19:21:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-07-13 19:21:04,020 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-07-13 19:21:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:04,020 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-07-13 19:21:04,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-07-13 19:21:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:04,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:04,344 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:04,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:21:04,544 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-07-13 19:21:04,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:04,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664333523] [2021-07-13 19:21:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:05,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:05,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664333523] [2021-07-13 19:21:05,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664333523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:05,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221156435] [2021-07-13 19:21:05,039 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:05,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:21:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221156435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:05,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:05,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:05,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317022760] [2021-07-13 19:21:05,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:05,303 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:06,709 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-07-13 19:21:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:21:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:07,757 INFO L225 Difference]: With dead ends: 133655 [2021-07-13 19:21:07,757 INFO L226 Difference]: Without dead ends: 133607 [2021-07-13 19:21:07,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:21:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-07-13 19:21:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-07-13 19:21:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-07-13 19:21:12,158 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-07-13 19:21:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:12,158 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-07-13 19:21:12,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-07-13 19:21:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:12,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:12,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:12,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 19:21:12,735 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-07-13 19:21:12,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:12,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816748037] [2021-07-13 19:21:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816748037] [2021-07-13 19:21:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816748037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120383644] [2021-07-13 19:21:12,868 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120383644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:13,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:13,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002444565] [2021-07-13 19:21:13,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:13,173 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:14,960 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-07-13 19:21:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:21:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:15,648 INFO L225 Difference]: With dead ends: 134042 [2021-07-13 19:21:15,648 INFO L226 Difference]: Without dead ends: 133996 [2021-07-13 19:21:15,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:21:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-07-13 19:21:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-07-13 19:21:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-07-13 19:21:20,105 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-07-13 19:21:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:20,105 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-07-13 19:21:20,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-07-13 19:21:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:21,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:21,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:21,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:21:21,590 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-07-13 19:21:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:21,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939585446] [2021-07-13 19:21:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:21,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939585446] [2021-07-13 19:21:21,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939585446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542869879] [2021-07-13 19:21:21,714 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:21,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542869879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:22,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:22,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798468418] [2021-07-13 19:21:22,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:22,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:22,072 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:24,257 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-07-13 19:21:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:21:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:25,042 INFO L225 Difference]: With dead ends: 134285 [2021-07-13 19:21:25,042 INFO L226 Difference]: Without dead ends: 134239 [2021-07-13 19:21:25,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:21:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-07-13 19:21:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-07-13 19:21:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-07-13 19:21:29,620 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-07-13 19:21:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:29,621 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-07-13 19:21:29,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-07-13 19:21:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:29,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:29,981 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:30,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 19:21:30,181 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-07-13 19:21:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:30,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270664290] [2021-07-13 19:21:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:30,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270664290] [2021-07-13 19:21:30,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270664290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842635641] [2021-07-13 19:21:30,280 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:30,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:21:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:30,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842635641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:30,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214654260] [2021-07-13 19:21:30,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:30,897 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:32,347 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-07-13 19:21:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:21:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:33,362 INFO L225 Difference]: With dead ends: 134286 [2021-07-13 19:21:33,362 INFO L226 Difference]: Without dead ends: 134256 [2021-07-13 19:21:33,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:21:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-07-13 19:21:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-07-13 19:21:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-07-13 19:21:37,870 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-07-13 19:21:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:37,870 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-07-13 19:21:37,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-07-13 19:21:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:38,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:38,252 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:38,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:38,457 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-07-13 19:21:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:38,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254987564] [2021-07-13 19:21:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:38,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:38,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254987564] [2021-07-13 19:21:38,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254987564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015124971] [2021-07-13 19:21:38,558 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:38,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:38,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015124971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:38,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:38,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655111305] [2021-07-13 19:21:38,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:38,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:38,888 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:39,559 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-07-13 19:21:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:40,820 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-07-13 19:21:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:41,461 INFO L225 Difference]: With dead ends: 134087 [2021-07-13 19:21:41,461 INFO L226 Difference]: Without dead ends: 134059 [2021-07-13 19:21:41,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:21:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-07-13 19:21:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-07-13 19:21:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-07-13 19:21:45,795 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-07-13 19:21:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:45,795 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-07-13 19:21:45,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-07-13 19:21:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:46,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:46,601 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:46,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 19:21:46,805 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-07-13 19:21:46,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:46,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940654450] [2021-07-13 19:21:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:46,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:46,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940654450] [2021-07-13 19:21:46,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940654450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:46,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137569330] [2021-07-13 19:21:46,918 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:46,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:21:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137569330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786855701] [2021-07-13 19:21:47,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:47,194 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:49,034 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-07-13 19:21:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:50,375 INFO L225 Difference]: With dead ends: 134211 [2021-07-13 19:21:50,375 INFO L226 Difference]: Without dead ends: 134069 [2021-07-13 19:21:50,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-07-13 19:21:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-07-13 19:21:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-07-13 19:21:55,190 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-07-13 19:21:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:55,190 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-07-13 19:21:55,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-07-13 19:21:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:21:55,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:55,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:55,756 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-07-13 19:21:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:55,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152719994] [2021-07-13 19:21:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:55,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152719994] [2021-07-13 19:21:55,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152719994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360452330] [2021-07-13 19:21:55,853 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 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 [2021-07-13 19:21:55,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:21:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:55,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:56,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360452330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:56,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:56,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:21:56,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727483959] [2021-07-13 19:21:56,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:21:56,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:21:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:56,122 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:57,851 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-07-13 19:21:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:21:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:58,590 INFO L225 Difference]: With dead ends: 134387 [2021-07-13 19:21:58,590 INFO L226 Difference]: Without dead ends: 134277 [2021-07-13 19:21:58,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-07-13 19:22:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-07-13 19:22:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-07-13 19:22:03,059 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-07-13 19:22:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:03,059 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-07-13 19:22:03,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-07-13 19:22:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:03,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:03,897 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:04,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:04,098 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-07-13 19:22:04,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:04,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455930953] [2021-07-13 19:22:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455930953] [2021-07-13 19:22:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455930953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298388686] [2021-07-13 19:22:04,194 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298388686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:04,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:04,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998033751] [2021-07-13 19:22:04,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:04,446 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:06,325 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-07-13 19:22:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:07,005 INFO L225 Difference]: With dead ends: 134490 [2021-07-13 19:22:07,006 INFO L226 Difference]: Without dead ends: 134406 [2021-07-13 19:22:07,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-07-13 19:22:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-07-13 19:22:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-07-13 19:22:11,582 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-07-13 19:22:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:11,582 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-07-13 19:22:11,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-07-13 19:22:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:11,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:11,939 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:12,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:12,140 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-07-13 19:22:12,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:12,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401813372] [2021-07-13 19:22:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:12,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401813372] [2021-07-13 19:22:12,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401813372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839143174] [2021-07-13 19:22:12,232 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:12,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839143174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:12,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:12,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464082180] [2021-07-13 19:22:12,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:12,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:12,850 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:14,295 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-07-13 19:22:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:22:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:15,338 INFO L225 Difference]: With dead ends: 134427 [2021-07-13 19:22:15,338 INFO L226 Difference]: Without dead ends: 134285 [2021-07-13 19:22:15,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 688.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-07-13 19:22:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-07-13 19:22:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-07-13 19:22:19,839 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-07-13 19:22:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:19,840 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-07-13 19:22:19,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-07-13 19:22:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:20,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:20,570 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:20,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:20,793 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-07-13 19:22:20,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:20,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480424641] [2021-07-13 19:22:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:20,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480424641] [2021-07-13 19:22:20,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480424641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571706779] [2021-07-13 19:22:20,915 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:20,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:22:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571706779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:21,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:21,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:21,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471397024] [2021-07-13 19:22:21,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:21,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:21,229 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:23,479 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-07-13 19:22:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:24,412 INFO L225 Difference]: With dead ends: 134488 [2021-07-13 19:22:24,412 INFO L226 Difference]: Without dead ends: 134378 [2021-07-13 19:22:24,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-07-13 19:22:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-07-13 19:22:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-07-13 19:22:29,073 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-07-13 19:22:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:29,073 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-07-13 19:22:29,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-07-13 19:22:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:29,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:29,438 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:29,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 19:22:29,639 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-07-13 19:22:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:29,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443558599] [2021-07-13 19:22:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:29,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:29,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443558599] [2021-07-13 19:22:29,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443558599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:29,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761467758] [2021-07-13 19:22:29,737 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:29,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:29,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:30,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761467758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:30,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:30,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763015541] [2021-07-13 19:22:30,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:30,416 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:31,817 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-07-13 19:22:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:31,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:32,795 INFO L225 Difference]: With dead ends: 134606 [2021-07-13 19:22:32,795 INFO L226 Difference]: Without dead ends: 134470 [2021-07-13 19:22:32,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-07-13 19:22:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-07-13 19:22:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-07-13 19:22:37,385 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-07-13 19:22:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:37,385 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-07-13 19:22:37,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-07-13 19:22:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:37,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:37,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:37,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:22:37,982 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-07-13 19:22:37,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:37,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686936986] [2021-07-13 19:22:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686936986] [2021-07-13 19:22:38,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686936986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198525890] [2021-07-13 19:22:38,078 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:38,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:22:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198525890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585643552] [2021-07-13 19:22:38,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:38,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:38,381 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:40,109 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-07-13 19:22:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:40,801 INFO L225 Difference]: With dead ends: 134895 [2021-07-13 19:22:40,802 INFO L226 Difference]: Without dead ends: 134785 [2021-07-13 19:22:40,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-07-13 19:22:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-07-13 19:22:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-07-13 19:22:45,362 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-07-13 19:22:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:45,362 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-07-13 19:22:45,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-07-13 19:22:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:46,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:46,252 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:46,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 19:22:46,452 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-07-13 19:22:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:46,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513918504] [2021-07-13 19:22:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:46,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:46,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513918504] [2021-07-13 19:22:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513918504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920288425] [2021-07-13 19:22:46,553 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:46,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:22:46,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:46,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:46,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920288425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:46,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:46,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944362763] [2021-07-13 19:22:46,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:46,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:46,831 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:48,558 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-07-13 19:22:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:49,964 INFO L225 Difference]: With dead ends: 135111 [2021-07-13 19:22:49,965 INFO L226 Difference]: Without dead ends: 134975 [2021-07-13 19:22:49,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-07-13 19:22:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-07-13 19:22:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-07-13 19:22:55,010 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-07-13 19:22:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:55,010 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-07-13 19:22:55,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-07-13 19:22:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:22:55,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:55,384 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:55,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:22:55,585 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-07-13 19:22:55,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419033737] [2021-07-13 19:22:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:55,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419033737] [2021-07-13 19:22:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419033737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746956597] [2021-07-13 19:22:55,687 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:22:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746956597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:56,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:56,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:22:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581301829] [2021-07-13 19:22:56,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:56,255 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:57,735 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-07-13 19:22:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:22:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:22:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:58,417 INFO L225 Difference]: With dead ends: 135221 [2021-07-13 19:22:58,417 INFO L226 Difference]: Without dead ends: 135130 [2021-07-13 19:22:58,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-07-13 19:23:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-07-13 19:23:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-07-13 19:23:03,363 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-07-13 19:23:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:03,363 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-07-13 19:23:03,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-07-13 19:23:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:03,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:03,755 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:03,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:03,956 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-07-13 19:23:03,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:03,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526425624] [2021-07-13 19:23:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:04,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:04,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526425624] [2021-07-13 19:23:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526425624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:04,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128584047] [2021-07-13 19:23:04,053 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:04,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:04,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128584047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:04,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:04,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438463951] [2021-07-13 19:23:04,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:04,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:04,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:04,331 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:06,158 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-07-13 19:23:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:06,876 INFO L225 Difference]: With dead ends: 135053 [2021-07-13 19:23:06,876 INFO L226 Difference]: Without dead ends: 135025 [2021-07-13 19:23:06,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:23:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-07-13 19:23:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-07-13 19:23:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-07-13 19:23:11,457 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-07-13 19:23:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:11,457 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-07-13 19:23:11,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-07-13 19:23:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:12,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:12,299 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:12,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-13 19:23:12,513 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-07-13 19:23:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:12,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365683665] [2021-07-13 19:23:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:12,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365683665] [2021-07-13 19:23:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365683665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142750922] [2021-07-13 19:23:12,614 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:12,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:23:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142750922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460612849] [2021-07-13 19:23:12,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:12,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:12,867 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:14,729 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-07-13 19:23:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:15,485 INFO L225 Difference]: With dead ends: 135170 [2021-07-13 19:23:15,485 INFO L226 Difference]: Without dead ends: 135028 [2021-07-13 19:23:15,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-07-13 19:23:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-07-13 19:23:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-07-13 19:23:20,425 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-07-13 19:23:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:20,425 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-07-13 19:23:20,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-07-13 19:23:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:21,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:21,033 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:21,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:21,249 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-07-13 19:23:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:21,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416168041] [2021-07-13 19:23:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:21,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:21,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416168041] [2021-07-13 19:23:21,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416168041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:21,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163718511] [2021-07-13 19:23:21,380 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:21,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:21,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163718511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:21,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:21,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559313263] [2021-07-13 19:23:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:21,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:21,790 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:22,248 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-07-13 19:23:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:24,121 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-07-13 19:23:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:24,883 INFO L225 Difference]: With dead ends: 135436 [2021-07-13 19:23:24,883 INFO L226 Difference]: Without dead ends: 135326 [2021-07-13 19:23:24,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-07-13 19:23:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-07-13 19:23:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-07-13 19:23:29,401 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-07-13 19:23:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:29,401 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-07-13 19:23:29,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-07-13 19:23:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:30,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:30,288 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:30,489 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-07-13 19:23:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292599299] [2021-07-13 19:23:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:30,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:30,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292599299] [2021-07-13 19:23:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292599299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:30,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269744363] [2021-07-13 19:23:30,586 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:30,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:23:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:30,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269744363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:30,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:30,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:30,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320833828] [2021-07-13 19:23:30,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:30,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:30,848 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:32,654 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-07-13 19:23:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:23:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:33,358 INFO L225 Difference]: With dead ends: 135409 [2021-07-13 19:23:33,359 INFO L226 Difference]: Without dead ends: 135325 [2021-07-13 19:23:33,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-07-13 19:23:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-07-13 19:23:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-07-13 19:23:37,916 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-07-13 19:23:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:37,916 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-07-13 19:23:37,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-07-13 19:23:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:38,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:38,758 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:38,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:38,982 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-07-13 19:23:38,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:38,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893162034] [2021-07-13 19:23:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:39,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893162034] [2021-07-13 19:23:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893162034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359499777] [2021-07-13 19:23:39,086 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:39,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:23:39,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:39,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:39,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359499777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:39,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:39,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850478494] [2021-07-13 19:23:39,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:39,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:39,407 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:41,232 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-07-13 19:23:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:41,949 INFO L225 Difference]: With dead ends: 135181 [2021-07-13 19:23:41,949 INFO L226 Difference]: Without dead ends: 135166 [2021-07-13 19:23:41,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:23:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-07-13 19:23:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-07-13 19:23:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-07-13 19:23:47,026 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-07-13 19:23:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:47,026 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-07-13 19:23:47,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-07-13 19:23:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:47,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:47,556 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:47,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-13 19:23:47,779 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-07-13 19:23:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:47,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811266847] [2021-07-13 19:23:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:47,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811266847] [2021-07-13 19:23:47,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811266847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566444036] [2021-07-13 19:23:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:48,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566444036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:48,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:48,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365211512] [2021-07-13 19:23:48,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:48,246 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:50,444 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-07-13 19:23:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:50,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:51,275 INFO L225 Difference]: With dead ends: 135441 [2021-07-13 19:23:51,276 INFO L226 Difference]: Without dead ends: 135329 [2021-07-13 19:23:51,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 791.0ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-07-13 19:23:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-07-13 19:23:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-07-13 19:23:56,165 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-07-13 19:23:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:56,165 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-07-13 19:23:56,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-07-13 19:23:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:23:56,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:56,548 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:56,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:56,748 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-07-13 19:23:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:56,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992365694] [2021-07-13 19:23:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:56,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:56,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992365694] [2021-07-13 19:23:56,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992365694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975751645] [2021-07-13 19:23:56,867 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:56,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:23:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:57,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975751645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:57,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:23:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560955188] [2021-07-13 19:23:57,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:57,155 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:58,993 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-07-13 19:23:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:23:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:59,662 INFO L225 Difference]: With dead ends: 135711 [2021-07-13 19:23:59,663 INFO L226 Difference]: Without dead ends: 135631 [2021-07-13 19:23:59,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:24:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-07-13 19:24:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-07-13 19:24:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-07-13 19:24:04,124 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-07-13 19:24:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:04,124 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-07-13 19:24:04,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-07-13 19:24:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:24:04,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:04,977 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:05,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:24:05,177 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-07-13 19:24:05,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:05,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101490576] [2021-07-13 19:24:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:05,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101490576] [2021-07-13 19:24:05,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101490576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611205264] [2021-07-13 19:24:05,286 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:24:05,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:24:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611205264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:05,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:24:05,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534728302] [2021-07-13 19:24:05,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:24:05,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:24:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:05,587 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:07,414 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-07-13 19:24:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:24:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:08,118 INFO L225 Difference]: With dead ends: 135676 [2021-07-13 19:24:08,118 INFO L226 Difference]: Without dead ends: 135646 [2021-07-13 19:24:08,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:24:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-07-13 19:24:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-07-13 19:24:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-07-13 19:24:13,198 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-07-13 19:24:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:13,198 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-07-13 19:24:13,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-07-13 19:24:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:24:13,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:13,629 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:13,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:13,845 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-07-13 19:24:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830434830] [2021-07-13 19:24:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:14,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830434830] [2021-07-13 19:24:14,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830434830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031801239] [2021-07-13 19:24:14,279 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:14,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:24:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031801239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:14,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:24:14,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923455828] [2021-07-13 19:24:14,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:24:14,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:24:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:14,641 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:16,353 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-07-13 19:24:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:24:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:17,435 INFO L225 Difference]: With dead ends: 136007 [2021-07-13 19:24:17,435 INFO L226 Difference]: Without dead ends: 135825 [2021-07-13 19:24:17,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:24:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-07-13 19:24:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-07-13 19:24:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-07-13 19:24:21,933 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-07-13 19:24:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:21,933 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-07-13 19:24:21,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-07-13 19:24:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:24:22,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:22,300 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:22,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 19:24:22,501 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-07-13 19:24:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922505180] [2021-07-13 19:24:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:22,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:22,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922505180] [2021-07-13 19:24:22,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922505180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:22,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448209390] [2021-07-13 19:24:22,597 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:22,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:24:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:24:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:22,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448209390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:22,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:22,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 19:24:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098610571] [2021-07-13 19:24:22,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:24:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:24:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:22,916 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:24,811 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-07-13 19:24:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:24:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:25,494 INFO L225 Difference]: With dead ends: 136135 [2021-07-13 19:24:25,494 INFO L226 Difference]: Without dead ends: 136008 [2021-07-13 19:24:25,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:24:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-07-13 19:24:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-07-13 19:24:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-07-13 19:24:29,945 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-07-13 19:24:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:29,946 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-07-13 19:24:29,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-07-13 19:24:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:24:30,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:30,814 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:31,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:24:31,014 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-07-13 19:24:31,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:31,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678033093] [2021-07-13 19:24:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:31,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:31,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678033093] [2021-07-13 19:24:31,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678033093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121882642] [2021-07-13 19:24:31,106 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:31,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:24:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:24:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:31,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121882642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:31,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 19:24:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546338964] [2021-07-13 19:24:31,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:24:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:24:31,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:31,360 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:33,153 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-07-13 19:24:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:24:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:33,845 INFO L225 Difference]: With dead ends: 135962 [2021-07-13 19:24:33,846 INFO L226 Difference]: Without dead ends: 135878 [2021-07-13 19:24:33,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:24:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. Received shutdown request... [2021-07-13 19:24:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-07-13 19:24:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:37,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:37,469 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:24:37,472 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:24:37,474 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:24:37,474 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:24:37 BasicIcfg [2021-07-13 19:24:37,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:24:37,475 INFO L168 Benchmark]: Toolchain (without parser) took 631394.75 ms. Allocated memory was 216.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 196.2 MB in the beginning and 4.2 GB in the end (delta: -4.0 GB). Peak memory consumption was 3.8 GB. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 216.0 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.81 ms. Allocated memory is still 216.0 MB. Free memory was 196.0 MB in the beginning and 194.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L168 Benchmark]: Boogie Preprocessor took 13.42 ms. Allocated memory is still 216.0 MB. Free memory was 194.6 MB in the beginning and 193.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L168 Benchmark]: RCFGBuilder took 222.03 ms. Allocated memory is still 216.0 MB. Free memory was 193.6 MB in the beginning and 181.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L168 Benchmark]: TraceAbstraction took 631127.68 ms. Allocated memory was 216.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 180.4 MB in the beginning and 4.2 GB in the end (delta: -4.1 GB). Peak memory consumption was 3.8 GB. Max. memory is 8.0 GB. [2021-07-13 19:24:37,475 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 216.0 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.81 ms. Allocated memory is still 216.0 MB. Free memory was 196.0 MB in the beginning and 194.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.42 ms. Allocated memory is still 216.0 MB. Free memory was 194.6 MB in the beginning and 193.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 222.03 ms. Allocated memory is still 216.0 MB. Free memory was 193.6 MB in the beginning and 181.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 631127.68 ms. Allocated memory was 216.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 180.4 MB in the beginning and 4.2 GB in the end (delta: -4.1 GB). Peak memory consumption was 3.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 631043.4ms, OverallIterations: 171, TraceHistogramMax: 3, EmptinessCheckTime: 34297.0ms, AutomataDifference: 204043.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 52.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9350 SDtfs, 21490 SDslu, 89588 SDs, 0 SdLazy, 62487 SolverSat, 3713 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28213.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7294 GetRequests, 3635 SyntacticMatches, 37 SemanticMatches, 3622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30749 ImplicationChecksByTransitivity, 47206.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=135578occurred in iteration=169, InterpolantAutomatonStates: 3004, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 311296.1ms AutomataMinimizationTime, 171 MinimizatonAttempts, 683042 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 736.6ms SsaConstructionTime, 2044.7ms SatisfiabilityAnalysisTime, 40579.6ms InterpolantComputationTime, 9377 NumberOfCodeBlocks, 9361 NumberOfCodeBlocksAsserted, 617 NumberOfCheckSat, 9042 ConstructedInterpolants, 0 QuantifiedInterpolants, 113991 SizeOfPredicates, 664 NumberOfNonLiveVariables, 12929 ConjunctsInSsa, 2716 ConjunctsInUnsatCore, 335 InterpolantComputations, 7 PerfectInterpolantSequences, 802/5192 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown