/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:02:09,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:02:09,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:02:09,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:02:09,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:02:09,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:02:09,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:02:09,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:02:09,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:02:09,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:02:09,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:02:09,215 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:02:09,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:02:09,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:02:09,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:02:09,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:02:09,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:02:09,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:02:09,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:02:09,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:02:09,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:02:09,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:02:09,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:02:09,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:02:09,220 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:02:09,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:02:09,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:02:09,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:02:09,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:02:09,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:02:09,530 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:02:09,531 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:02:09,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-07-09 18:02:09,532 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-07-09 18:02:09,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:02:09,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:02:09,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:02:09,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:02:09,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:02:09,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:02:09,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:02:09,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:02:09,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:02:09,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... [2021-07-09 18:02:09,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:02:09,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:02:09,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:02:09,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:02:09,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:02:09,663 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:02:09,664 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:02:09,664 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:02:09,664 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:02:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:02:09,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:02:09,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:02:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:02:09,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:02:09,666 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:02:09,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:02:09,807 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:02:09,809 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:02:09 BoogieIcfgContainer [2021-07-09 18:02:09,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:02:09,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:02:09,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:02:09,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:02:09,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:02:09" (1/2) ... [2021-07-09 18:02:09,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c40de6 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:02:09, skipping insertion in model container [2021-07-09 18:02:09,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:02:09" (2/2) ... [2021-07-09 18:02:09,814 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-07-09 18:02:09,817 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:02:09,818 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:02:09,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:02:09,818 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:02:09,838 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:02:09,852 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:02:09,865 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:02:09,865 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:02:09,865 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:02:09,865 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:02:09,865 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:02:09,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:02:09,866 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:02:09,866 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:02:09,872 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-09 18:02:09,896 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:02:09,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:09,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:09,902 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-07-09 18:02:09,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:09,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726741607] [2021-07-09 18:02:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726741607] [2021-07-09 18:02:10,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726741607] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:02:10,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:02:10,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:02:10,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448149402] [2021-07-09 18:02:10,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:02:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:02:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:02:10,110 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-07-09 18:02:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,139 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-07-09 18:02:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:02:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-07-09 18:02:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,146 INFO L225 Difference]: With dead ends: 43 [2021-07-09 18:02:10,146 INFO L226 Difference]: Without dead ends: 43 [2021-07-09 18:02:10,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:02:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-09 18:02:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-07-09 18:02:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-07-09 18:02:10,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-07-09 18:02:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,170 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-07-09 18:02:10,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-07-09 18:02:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-07-09 18:02:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:02:10,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,171 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:02:10,171 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-07-09 18:02:10,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633436222] [2021-07-09 18:02:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:10,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633436222] [2021-07-09 18:02:10,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633436222] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:02:10,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:02:10,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:02:10,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055469966] [2021-07-09 18:02:10,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:02:10,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:02:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:02:10,223 INFO L87 Difference]: Start difference. First operand 38 states and 67 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) [2021-07-09 18:02:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,252 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-07-09 18:02:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:02:10,252 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 [2021-07-09 18:02:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,254 INFO L225 Difference]: With dead ends: 50 [2021-07-09 18:02:10,254 INFO L226 Difference]: Without dead ends: 50 [2021-07-09 18:02:10,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:02:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-09 18:02:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-07-09 18:02:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-07-09 18:02:10,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-07-09 18:02:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,261 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-07-09 18:02:10,261 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) [2021-07-09 18:02:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-07-09 18:02:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:02:10,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,262 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:02:10,262 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-07-09 18:02:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933522366] [2021-07-09 18:02:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933522366] [2021-07-09 18:02:10,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933522366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352904806] [2021-07-09 18:02:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:10,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352904806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:10,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:02:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249391245] [2021-07-09 18:02:10,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:02:10,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:02:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:02:10,463 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,480 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-07-09 18:02:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:02:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,481 INFO L225 Difference]: With dead ends: 99 [2021-07-09 18:02:10,481 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 18:02:10,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:02:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 18:02:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-07-09 18:02:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-07-09 18:02:10,490 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-07-09 18:02:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,490 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-07-09 18:02:10,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-07-09 18:02:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:02:10,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,491 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:02:10,708 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-07-09 18:02:10,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223134034] [2021-07-09 18:02:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223134034] [2021-07-09 18:02:10,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223134034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847326483] [2021-07-09 18:02:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:10,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:02:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847326483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:10,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:02:10,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898320121] [2021-07-09 18:02:10,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:02:10,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:02:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:02:10,895 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,913 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-07-09 18:02:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,914 INFO L225 Difference]: With dead ends: 80 [2021-07-09 18:02:10,914 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 18:02:10,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:02:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 18:02:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-07-09 18:02:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-07-09 18:02:10,919 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-07-09 18:02:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,919 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-07-09 18:02:10,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-07-09 18:02:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:10,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:11,140 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-07-09 18:02:11,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:11,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236437559] [2021-07-09 18:02:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236437559] [2021-07-09 18:02:11,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236437559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849419333] [2021-07-09 18:02:11,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:02:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849419333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:11,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:02:11,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214412264] [2021-07-09 18:02:11,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:02:11,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:11,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:02:11,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:11,463 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:11,740 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-07-09 18:02:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:11,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-07-09 18:02:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:11,745 INFO L225 Difference]: With dead ends: 198 [2021-07-09 18:02:11,746 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 18:02:11,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:02:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 18:02:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-07-09 18:02:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-07-09 18:02:11,773 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-07-09 18:02:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:11,773 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-07-09 18:02:11,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-07-09 18:02:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:11,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:11,774 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:11,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:11,991 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-07-09 18:02:11,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:11,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142526418] [2021-07-09 18:02:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:12,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142526418] [2021-07-09 18:02:12,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142526418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857121690] [2021-07-09 18:02:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:02:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857121690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:12,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-09 18:02:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893998250] [2021-07-09 18:02:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:12,174 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:12,447 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-07-09 18:02:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:02:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 [2021-07-09 18:02:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:12,449 INFO L225 Difference]: With dead ends: 170 [2021-07-09 18:02:12,449 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 18:02:12,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 18:02:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-07-09 18:02:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-07-09 18:02:12,460 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-07-09 18:02:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:12,461 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-07-09 18:02:12,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-07-09 18:02:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:12,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:12,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,664 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-07-09 18:02:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:12,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206004009] [2021-07-09 18:02:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:12,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206004009] [2021-07-09 18:02:12,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206004009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612641774] [2021-07-09 18:02:12,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:02:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612641774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:12,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:02:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50382215] [2021-07-09 18:02:12,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:02:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:02:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:02:12,814 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:12,833 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-07-09 18:02:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:02:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:12,834 INFO L225 Difference]: With dead ends: 190 [2021-07-09 18:02:12,834 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 18:02:12,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:02:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 18:02:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-07-09 18:02:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-07-09 18:02:12,838 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-07-09 18:02:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:12,838 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-07-09 18:02:12,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-07-09 18:02:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:12,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:12,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:13,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:13,056 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-07-09 18:02:13,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:13,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711080123] [2021-07-09 18:02:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711080123] [2021-07-09 18:02:13,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711080123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173131431] [2021-07-09 18:02:13,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:13,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173131431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:13,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:02:13,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063415506] [2021-07-09 18:02:13,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:02:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:02:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:02:13,339 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:13,779 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-07-09 18:02:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:02:13,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:13,793 INFO L225 Difference]: With dead ends: 320 [2021-07-09 18:02:13,793 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 18:02:13,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:02:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 18:02:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-07-09 18:02:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-07-09 18:02:13,798 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-07-09 18:02:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:13,798 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-07-09 18:02:13,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-07-09 18:02:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:13,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:13,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:14,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,013 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-07-09 18:02:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608641804] [2021-07-09 18:02:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608641804] [2021-07-09 18:02:14,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608641804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612309345] [2021-07-09 18:02:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612309345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:14,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:02:14,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218945906] [2021-07-09 18:02:14,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:02:14,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:02:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:14,234 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:14,530 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-07-09 18:02:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:02:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 [2021-07-09 18:02:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:14,531 INFO L225 Difference]: With dead ends: 321 [2021-07-09 18:02:14,531 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 18:02:14,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:02:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 18:02:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-07-09 18:02:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-07-09 18:02:14,537 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-07-09 18:02:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:14,537 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-07-09 18:02:14,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-07-09 18:02:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:14,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:14,538 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:02:14,756 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-07-09 18:02:14,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632821966] [2021-07-09 18:02:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632821966] [2021-07-09 18:02:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632821966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551426534] [2021-07-09 18:02:14,838 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:14,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551426534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:15,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:02:15,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824633686] [2021-07-09 18:02:15,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:02:15,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:02:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:15,102 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:15,600 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-07-09 18:02:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:02:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:02:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:15,603 INFO L225 Difference]: With dead ends: 435 [2021-07-09 18:02:15,603 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 18:02:15,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:02:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 18:02:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-07-09 18:02:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-07-09 18:02:15,613 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-07-09 18:02:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:15,613 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-07-09 18:02:15,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-07-09 18:02:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:15,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:15,614 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:15,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 18:02:15,829 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:15,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-07-09 18:02:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:15,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712126] [2021-07-09 18:02:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712126] [2021-07-09 18:02:15,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116540967] [2021-07-09 18:02:15,872 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:15,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:02:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:15,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116540967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:16,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-07-09 18:02:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892656574] [2021-07-09 18:02:16,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:02:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:02:16,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:16,028 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:16,460 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-07-09 18:02:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:02:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-07-09 18:02:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:16,462 INFO L225 Difference]: With dead ends: 340 [2021-07-09 18:02:16,462 INFO L226 Difference]: Without dead ends: 336 [2021-07-09 18:02:16,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:02:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-09 18:02:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-07-09 18:02:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-07-09 18:02:16,467 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-07-09 18:02:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:16,467 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-07-09 18:02:16,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-07-09 18:02:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:02:16,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:16,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:16,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:16,679 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-07-09 18:02:16,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:16,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519136084] [2021-07-09 18:02:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519136084] [2021-07-09 18:02:16,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519136084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956122171] [2021-07-09 18:02:16,765 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:16,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:02:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956122171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:16,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:02:16,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604385285] [2021-07-09 18:02:16,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:02:16,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:02:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:16,839 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:16,862 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-07-09 18:02:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:02:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:16,863 INFO L225 Difference]: With dead ends: 354 [2021-07-09 18:02:16,863 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 18:02:16,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 18:02:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-07-09 18:02:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-07-09 18:02:16,869 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-07-09 18:02:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:16,869 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-07-09 18:02:16,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-07-09 18:02:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:02:16,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:16,869 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:17,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:17,089 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:17,089 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-07-09 18:02:17,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:17,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32165040] [2021-07-09 18:02:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32165040] [2021-07-09 18:02:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32165040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265189614] [2021-07-09 18:02:17,188 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:17,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:02:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:02:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265189614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:17,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:02:17,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470396677] [2021-07-09 18:02:17,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:17,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:17,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:17,410 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:18,149 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-07-09 18:02:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:02:18,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:02:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:18,151 INFO L225 Difference]: With dead ends: 559 [2021-07-09 18:02:18,151 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 18:02:18,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:02:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 18:02:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-07-09 18:02:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-07-09 18:02:18,158 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-07-09 18:02:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:18,158 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-07-09 18:02:18,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-07-09 18:02:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:02:18,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:18,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:18,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:02:18,377 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-07-09 18:02:18,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:18,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003978970] [2021-07-09 18:02:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003978970] [2021-07-09 18:02:18,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003978970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875323938] [2021-07-09 18:02:18,460 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:18,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:02:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:02:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875323938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:18,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:02:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975093187] [2021-07-09 18:02:18,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:18,684 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:19,413 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-07-09 18:02:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:02:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:02:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:19,417 INFO L225 Difference]: With dead ends: 976 [2021-07-09 18:02:19,417 INFO L226 Difference]: Without dead ends: 940 [2021-07-09 18:02:19,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 672.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-07-09 18:02:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-07-09 18:02:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-07-09 18:02:19,425 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-07-09 18:02:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:19,425 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-07-09 18:02:19,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-07-09 18:02:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:02:19,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:19,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:19,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:02:19,653 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-07-09 18:02:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:19,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476018888] [2021-07-09 18:02:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:19,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476018888] [2021-07-09 18:02:19,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476018888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235777635] [2021-07-09 18:02:19,742 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:02:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:20,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235777635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:20,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:20,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:02:20,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862973931] [2021-07-09 18:02:20,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:20,050 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:20,761 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-07-09 18:02:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:02:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 27 [2021-07-09 18:02:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:20,764 INFO L225 Difference]: With dead ends: 802 [2021-07-09 18:02:20,764 INFO L226 Difference]: Without dead ends: 794 [2021-07-09 18:02:20,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:02:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-07-09 18:02:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-07-09 18:02:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-07-09 18:02:20,776 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-07-09 18:02:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:20,776 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-07-09 18:02:20,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-07-09 18:02:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:02:20,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:20,777 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:20,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:02:20,993 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-07-09 18:02:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:20,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477014307] [2021-07-09 18:02:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477014307] [2021-07-09 18:02:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477014307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873474618] [2021-07-09 18:02:21,107 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:02:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873474618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:21,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:21,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423070279] [2021-07-09 18:02:21,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:21,326 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:22,061 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-07-09 18:02:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:02:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:02:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:22,063 INFO L225 Difference]: With dead ends: 680 [2021-07-09 18:02:22,063 INFO L226 Difference]: Without dead ends: 638 [2021-07-09 18:02:22,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 674.9ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:02:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-09 18:02:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-07-09 18:02:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-07-09 18:02:22,078 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-07-09 18:02:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:22,079 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-07-09 18:02:22,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-07-09 18:02:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:02:22,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:22,079 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:22,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:22,296 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-07-09 18:02:22,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:22,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642886195] [2021-07-09 18:02:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:22,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:22,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642886195] [2021-07-09 18:02:22,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642886195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123302729] [2021-07-09 18:02:22,357 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:22,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:02:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:22,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123302729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:22,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-07-09 18:02:22,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840815770] [2021-07-09 18:02:22,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:02:22,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:02:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:22,586 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:23,364 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-07-09 18:02:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:02:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:02:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:23,366 INFO L225 Difference]: With dead ends: 520 [2021-07-09 18:02:23,366 INFO L226 Difference]: Without dead ends: 516 [2021-07-09 18:02:23,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:02:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-09 18:02:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-07-09 18:02:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-07-09 18:02:23,371 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-07-09 18:02:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-07-09 18:02:23,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-07-09 18:02:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:23,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:23,372 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:23,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:23,585 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-07-09 18:02:23,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:23,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161377263] [2021-07-09 18:02:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:23,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161377263] [2021-07-09 18:02:23,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161377263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633282532] [2021-07-09 18:02:23,663 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:23,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:02:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633282532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 18:02:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174272774] [2021-07-09 18:02:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:02:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:02:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:02:23,733 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) 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) [2021-07-09 18:02:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:23,766 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-07-09 18:02:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) 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 31 [2021-07-09 18:02:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:23,768 INFO L225 Difference]: With dead ends: 492 [2021-07-09 18:02:23,768 INFO L226 Difference]: Without dead ends: 453 [2021-07-09 18:02:23,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:02:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-09 18:02:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-07-09 18:02:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-07-09 18:02:23,774 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-07-09 18:02:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:23,774 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-07-09 18:02:23,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) 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) [2021-07-09 18:02:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-07-09 18:02:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:23,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:23,775 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:23,989 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-07-09 18:02:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555684328] [2021-07-09 18:02:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:24,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555684328] [2021-07-09 18:02:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555684328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649377356] [2021-07-09 18:02:24,151 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:24,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:02:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:24,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649377356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:24,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:24,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 18:02:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815900843] [2021-07-09 18:02:24,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:24,425 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:25,511 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-07-09 18:02:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:02:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:02:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:25,513 INFO L225 Difference]: With dead ends: 772 [2021-07-09 18:02:25,513 INFO L226 Difference]: Without dead ends: 766 [2021-07-09 18:02:25,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1000.0ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-09 18:02:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-07-09 18:02:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-07-09 18:02:25,521 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-07-09 18:02:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:25,521 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-07-09 18:02:25,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-07-09 18:02:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:25,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:25,522 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:25,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:02:25,738 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-07-09 18:02:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:25,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989382133] [2021-07-09 18:02:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989382133] [2021-07-09 18:02:25,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989382133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970978566] [2021-07-09 18:02:25,849 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:25,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:02:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:02:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970978566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:26,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:26,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:02:26,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432692150] [2021-07-09 18:02:26,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:26,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:26,100 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:27,090 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-07-09 18:02:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:02:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:02:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:27,094 INFO L225 Difference]: With dead ends: 1342 [2021-07-09 18:02:27,095 INFO L226 Difference]: Without dead ends: 1318 [2021-07-09 18:02:27,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:02:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-09 18:02:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-07-09 18:02:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-07-09 18:02:27,109 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-07-09 18:02:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:27,109 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-07-09 18:02:27,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-07-09 18:02:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:27,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:27,110 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:27,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:02:27,326 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-07-09 18:02:27,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:27,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612364183] [2021-07-09 18:02:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:27,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612364183] [2021-07-09 18:02:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612364183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292325494] [2021-07-09 18:02:27,410 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:02:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:27,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292325494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:27,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:27,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 18:02:27,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226788218] [2021-07-09 18:02:27,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:27,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:27,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:27,667 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:28,737 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-07-09 18:02:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:02:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:28,741 INFO L225 Difference]: With dead ends: 1094 [2021-07-09 18:02:28,741 INFO L226 Difference]: Without dead ends: 1090 [2021-07-09 18:02:28,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 929.9ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:02:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-09 18:02:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-07-09 18:02:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-07-09 18:02:28,750 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-07-09 18:02:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:28,750 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-07-09 18:02:28,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-07-09 18:02:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:28,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:28,751 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:28,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:02:28,969 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-07-09 18:02:28,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:28,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909756247] [2021-07-09 18:02:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909756247] [2021-07-09 18:02:29,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909756247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664681758] [2021-07-09 18:02:29,076 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:29,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:29,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:02:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664681758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:29,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 18:02:29,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890036820] [2021-07-09 18:02:29,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:29,324 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:30,270 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-07-09 18:02:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:02:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:02:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:30,275 INFO L225 Difference]: With dead ends: 1727 [2021-07-09 18:02:30,275 INFO L226 Difference]: Without dead ends: 1631 [2021-07-09 18:02:30,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 849.4ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:02:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-09 18:02:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-07-09 18:02:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-07-09 18:02:30,289 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-07-09 18:02:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:30,289 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-07-09 18:02:30,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-07-09 18:02:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:02:30,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:30,290 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:30,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:02:30,507 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-07-09 18:02:30,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:30,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480066994] [2021-07-09 18:02:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:30,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480066994] [2021-07-09 18:02:30,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480066994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689710634] [2021-07-09 18:02:30,571 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:02:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:30,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689710634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:30,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:30,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-09 18:02:30,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845641012] [2021-07-09 18:02:30,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:30,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:30,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:30,814 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:31,980 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-07-09 18:02:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:02:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:02:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:31,984 INFO L225 Difference]: With dead ends: 1314 [2021-07-09 18:02:31,984 INFO L226 Difference]: Without dead ends: 1310 [2021-07-09 18:02:31,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1075.6ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:02:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-07-09 18:02:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-07-09 18:02:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-07-09 18:02:31,996 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-07-09 18:02:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:31,996 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-07-09 18:02:31,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-07-09 18:02:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:31,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:31,997 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:32,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:32,214 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-07-09 18:02:32,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:32,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421113627] [2021-07-09 18:02:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421113627] [2021-07-09 18:02:32,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421113627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055975184] [2021-07-09 18:02:32,330 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:32,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:02:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055975184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:32,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:02:32,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748720945] [2021-07-09 18:02:32,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:02:32,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:02:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:02:32,589 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:33,668 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-07-09 18:02:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:02:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:33,672 INFO L225 Difference]: With dead ends: 1171 [2021-07-09 18:02:33,672 INFO L226 Difference]: Without dead ends: 1099 [2021-07-09 18:02:33,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1031.4ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:02:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-09 18:02:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-07-09 18:02:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-07-09 18:02:33,682 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-07-09 18:02:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:33,682 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-07-09 18:02:33,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-07-09 18:02:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:33,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:33,684 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:33,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:33,901 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-07-09 18:02:33,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:33,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025928368] [2021-07-09 18:02:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:33,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:33,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025928368] [2021-07-09 18:02:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025928368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901267258] [2021-07-09 18:02:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:33,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:02:33,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:34,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:02:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901267258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:34,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-09 18:02:34,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254709033] [2021-07-09 18:02:34,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:34,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:34,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:34,212 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:35,333 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-07-09 18:02:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:02:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:02:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:35,336 INFO L225 Difference]: With dead ends: 940 [2021-07-09 18:02:35,336 INFO L226 Difference]: Without dead ends: 936 [2021-07-09 18:02:35,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:02:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-09 18:02:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-07-09 18:02:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-07-09 18:02:35,346 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-07-09 18:02:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-07-09 18:02:35,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-07-09 18:02:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:35,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:35,347 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:35,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:02:35,564 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-07-09 18:02:35,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:35,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463080205] [2021-07-09 18:02:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:35,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463080205] [2021-07-09 18:02:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463080205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511085048] [2021-07-09 18:02:35,649 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:35,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:02:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511085048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:35,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-07-09 18:02:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113245800] [2021-07-09 18:02:35,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:35,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:35,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:35,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:35,788 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:35,927 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-07-09 18:02:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:02:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:02:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:35,930 INFO L225 Difference]: With dead ends: 950 [2021-07-09 18:02:35,931 INFO L226 Difference]: Without dead ends: 896 [2021-07-09 18:02:35,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-09 18:02:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-07-09 18:02:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-07-09 18:02:35,941 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-07-09 18:02:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:35,941 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-07-09 18:02:35,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-07-09 18:02:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:35,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:35,943 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:36,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:36,144 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-07-09 18:02:36,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:36,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566872639] [2021-07-09 18:02:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:36,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566872639] [2021-07-09 18:02:36,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566872639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014208541] [2021-07-09 18:02:36,280 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:02:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:36,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014208541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:36,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:36,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:02:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713246307] [2021-07-09 18:02:36,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:02:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:02:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:02:36,584 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-07-09 18:02:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:38,455 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-07-09 18:02:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:02:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 35 [2021-07-09 18:02:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:38,462 INFO L225 Difference]: With dead ends: 2174 [2021-07-09 18:02:38,462 INFO L226 Difference]: Without dead ends: 2150 [2021-07-09 18:02:38,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1416.6ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:02:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-07-09 18:02:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-07-09 18:02:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-07-09 18:02:38,482 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-07-09 18:02:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:38,482 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-07-09 18:02:38,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-07-09 18:02:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-07-09 18:02:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:38,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:38,483 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:38,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:02:38,700 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-07-09 18:02:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:38,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746832828] [2021-07-09 18:02:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:38,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:38,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746832828] [2021-07-09 18:02:38,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746832828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:38,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644257138] [2021-07-09 18:02:38,814 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:38,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:02:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644257138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 18:02:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710393569] [2021-07-09 18:02:39,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:02:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:02:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:02:39,124 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:40,617 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-07-09 18:02:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:02:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:02:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:40,622 INFO L225 Difference]: With dead ends: 1787 [2021-07-09 18:02:40,622 INFO L226 Difference]: Without dead ends: 1783 [2021-07-09 18:02:40,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1234.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:02:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-07-09 18:02:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-07-09 18:02:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-07-09 18:02:40,647 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-07-09 18:02:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:40,647 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-07-09 18:02:40,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-07-09 18:02:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:40,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:40,650 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:40,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:40,862 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-07-09 18:02:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:40,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29220684] [2021-07-09 18:02:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:40,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:40,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29220684] [2021-07-09 18:02:40,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29220684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:40,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355643068] [2021-07-09 18:02:40,967 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:40,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:02:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:41,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355643068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:41,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:41,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:02:41,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347434244] [2021-07-09 18:02:41,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:02:41,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:02:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:02:41,261 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-07-09 18:02:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:42,958 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-07-09 18:02:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:02:42,958 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 35 [2021-07-09 18:02:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:42,973 INFO L225 Difference]: With dead ends: 2749 [2021-07-09 18:02:42,973 INFO L226 Difference]: Without dead ends: 2653 [2021-07-09 18:02:42,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1379.2ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:02:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-07-09 18:02:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-07-09 18:02:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-07-09 18:02:42,992 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-07-09 18:02:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:42,992 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-07-09 18:02:42,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-07-09 18:02:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-07-09 18:02:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:42,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:42,994 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:43,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:02:43,209 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-07-09 18:02:43,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:43,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679473529] [2021-07-09 18:02:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679473529] [2021-07-09 18:02:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679473529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015160637] [2021-07-09 18:02:43,328 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:43,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:43,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015160637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:43,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:02:43,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900808494] [2021-07-09 18:02:43,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:02:43,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:02:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:02:43,640 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-07-09 18:02:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:45,015 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-07-09 18:02:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:02:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 35 [2021-07-09 18:02:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:45,022 INFO L225 Difference]: With dead ends: 3359 [2021-07-09 18:02:45,022 INFO L226 Difference]: Without dead ends: 3170 [2021-07-09 18:02:45,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1241.9ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:02:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-07-09 18:02:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-07-09 18:02:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-07-09 18:02:45,061 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-07-09 18:02:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:45,061 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-07-09 18:02:45,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-07-09 18:02:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-07-09 18:02:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:02:45,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:45,062 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:45,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:02:45,271 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:45,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-07-09 18:02:45,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:45,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699781252] [2021-07-09 18:02:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:45,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699781252] [2021-07-09 18:02:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699781252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812186612] [2021-07-09 18:02:45,355 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:45,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:02:45,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:02:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812186612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-07-09 18:02:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53694867] [2021-07-09 18:02:45,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:45,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:45,677 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:47,478 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-07-09 18:02:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:02:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:02:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:47,482 INFO L225 Difference]: With dead ends: 2167 [2021-07-09 18:02:47,482 INFO L226 Difference]: Without dead ends: 2163 [2021-07-09 18:02:47,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1568.3ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:02:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-09 18:02:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-07-09 18:02:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-07-09 18:02:47,500 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-07-09 18:02:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:47,500 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-07-09 18:02:47,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-07-09 18:02:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:02:47,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:47,502 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:47,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:02:47,717 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-07-09 18:02:47,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:47,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64100822] [2021-07-09 18:02:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64100822] [2021-07-09 18:02:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64100822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496194078] [2021-07-09 18:02:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:47,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:02:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:02:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:48,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496194078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:48,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:48,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:02:48,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117864491] [2021-07-09 18:02:48,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:02:48,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:02:48,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:02:48,173 INFO L87 Difference]: Start difference. First operand 800 states and 1854 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:49,940 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-07-09 18:02:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:02:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:02:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:49,943 INFO L225 Difference]: With dead ends: 1623 [2021-07-09 18:02:49,943 INFO L226 Difference]: Without dead ends: 1515 [2021-07-09 18:02:49,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1509.8ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:02:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-09 18:02:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-07-09 18:02:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-07-09 18:02:49,956 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-07-09 18:02:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:49,957 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-07-09 18:02:49,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-07-09 18:02:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:02:49,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:49,958 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:50,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:50,175 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-07-09 18:02:50,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:50,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416446342] [2021-07-09 18:02:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416446342] [2021-07-09 18:02:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416446342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570597405] [2021-07-09 18:02:50,242 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570597405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:50,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-07-09 18:02:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488052958] [2021-07-09 18:02:50,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:50,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:50,516 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 18:02:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:52,067 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-07-09 18:02:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:02:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 37 [2021-07-09 18:02:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:52,070 INFO L225 Difference]: With dead ends: 1315 [2021-07-09 18:02:52,070 INFO L226 Difference]: Without dead ends: 1311 [2021-07-09 18:02:52,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1470.1ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:02:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-07-09 18:02:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-07-09 18:02:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-07-09 18:02:52,082 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-07-09 18:02:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:52,082 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-07-09 18:02:52,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 18:02:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-07-09 18:02:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:02:52,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:52,084 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:52,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:02:52,301 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-07-09 18:02:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:52,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740462321] [2021-07-09 18:02:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:52,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740462321] [2021-07-09 18:02:52,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740462321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775813009] [2021-07-09 18:02:52,369 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:52,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:02:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775813009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-07-09 18:02:52,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995752431] [2021-07-09 18:02:52,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:52,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:52,642 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:53,779 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-07-09 18:02:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:02:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:02:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:53,792 INFO L225 Difference]: With dead ends: 2091 [2021-07-09 18:02:53,792 INFO L226 Difference]: Without dead ends: 2082 [2021-07-09 18:02:53,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 975.7ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:02:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-07-09 18:02:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-07-09 18:02:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-07-09 18:02:53,811 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-07-09 18:02:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:53,811 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-07-09 18:02:53,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-07-09 18:02:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:02:53,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:53,838 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:54,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:02:54,053 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:54,053 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-07-09 18:02:54,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:54,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107718793] [2021-07-09 18:02:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:54,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107718793] [2021-07-09 18:02:54,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107718793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999548985] [2021-07-09 18:02:54,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:02:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:02:54,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999548985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:54,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-07-09 18:02:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244247535] [2021-07-09 18:02:54,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:02:54,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:02:54,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:54,288 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:54,431 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-07-09 18:02:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:02:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:02:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:54,435 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 18:02:54,435 INFO L226 Difference]: Without dead ends: 1874 [2021-07-09 18:02:54,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:02:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-07-09 18:02:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-07-09 18:02:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-07-09 18:02:54,467 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-07-09 18:02:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:54,467 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-07-09 18:02:54,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-07-09 18:02:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:02:54,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:54,469 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:54,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:02:54,686 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-07-09 18:02:54,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:54,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519854686] [2021-07-09 18:02:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:54,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519854686] [2021-07-09 18:02:54,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519854686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813990631] [2021-07-09 18:02:54,812 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:54,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:55,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813990631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:55,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:55,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-07-09 18:02:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129704364] [2021-07-09 18:02:55,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:02:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:02:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:02:55,240 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:57,804 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-07-09 18:02:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:02:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:02:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:57,809 INFO L225 Difference]: With dead ends: 3088 [2021-07-09 18:02:57,810 INFO L226 Difference]: Without dead ends: 3084 [2021-07-09 18:02:57,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1859.1ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:02:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-07-09 18:02:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-07-09 18:02:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-07-09 18:02:57,835 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-07-09 18:02:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:57,835 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-07-09 18:02:57,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-07-09 18:02:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:02:57,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:57,838 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:58,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 18:02:58,053 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:58,054 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-07-09 18:02:58,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:58,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914056081] [2021-07-09 18:02:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:58,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914056081] [2021-07-09 18:02:58,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914056081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419506515] [2021-07-09 18:02:58,178 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:58,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 18:02:58,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:02:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419506515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:58,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-09 18:02:58,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766281290] [2021-07-09 18:02:58,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:02:58,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:02:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:02:58,561 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:01,272 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-07-09 18:03:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:03:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:03:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:01,279 INFO L225 Difference]: With dead ends: 4762 [2021-07-09 18:03:01,279 INFO L226 Difference]: Without dead ends: 4714 [2021-07-09 18:03:01,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 2158.5ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 18:03:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-07-09 18:03:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-07-09 18:03:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-07-09 18:03:01,314 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-07-09 18:03:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:01,314 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-07-09 18:03:01,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-07-09 18:03:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:03:01,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:01,316 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:01,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:01,531 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:01,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-07-09 18:03:01,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:01,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879845361] [2021-07-09 18:03:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:01,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879845361] [2021-07-09 18:03:01,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879845361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498709183] [2021-07-09 18:03:01,679 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:01,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:03:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:03:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:02,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498709183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:02,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:02,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:03:02,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662503961] [2021-07-09 18:03:02,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:03:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:02,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:03:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:03:02,108 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:03,997 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-07-09 18:03:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:03:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:03:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:04,005 INFO L225 Difference]: With dead ends: 5523 [2021-07-09 18:03:04,005 INFO L226 Difference]: Without dead ends: 5397 [2021-07-09 18:03:04,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1677.1ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:03:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-09 18:03:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-07-09 18:03:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-07-09 18:03:04,046 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-07-09 18:03:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:04,046 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-07-09 18:03:04,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-07-09 18:03:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:03:04,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:04,048 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:04,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:03:04,265 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-07-09 18:03:04,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:04,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659090900] [2021-07-09 18:03:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:04,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:04,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659090900] [2021-07-09 18:03:04,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659090900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:04,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534766965] [2021-07-09 18:03:04,430 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:03:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:04,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534766965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:04,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:04,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:03:04,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706606922] [2021-07-09 18:03:04,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:03:04,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:03:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:03:04,826 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:06,768 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-07-09 18:03:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:03:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:03:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:06,777 INFO L225 Difference]: With dead ends: 5929 [2021-07-09 18:03:06,777 INFO L226 Difference]: Without dead ends: 5656 [2021-07-09 18:03:06,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1703.2ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:03:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-07-09 18:03:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-07-09 18:03:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-07-09 18:03:06,840 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-07-09 18:03:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:06,840 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-07-09 18:03:06,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-07-09 18:03:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:03:06,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:06,843 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:07,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-09 18:03:07,058 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-07-09 18:03:07,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:07,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296595965] [2021-07-09 18:03:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:07,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296595965] [2021-07-09 18:03:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296595965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980546153] [2021-07-09 18:03:07,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:07,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:07,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:03:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980546153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:07,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:07,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-07-09 18:03:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506201798] [2021-07-09 18:03:07,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:03:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:03:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:03:07,467 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:10,056 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-07-09 18:03:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:03:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:03:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:10,062 INFO L225 Difference]: With dead ends: 3958 [2021-07-09 18:03:10,062 INFO L226 Difference]: Without dead ends: 3954 [2021-07-09 18:03:10,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2330.0ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:03:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-07-09 18:03:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-07-09 18:03:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-07-09 18:03:10,108 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-07-09 18:03:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:10,108 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-07-09 18:03:10,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-07-09 18:03:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:03:10,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:10,125 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:10,325 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-07-09 18:03:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:10,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625292537] [2021-07-09 18:03:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:10,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625292537] [2021-07-09 18:03:10,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625292537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368735040] [2021-07-09 18:03:10,539 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:10,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:03:10,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:03:10,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:11,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368735040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:11,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:11,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-09 18:03:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97495999] [2021-07-09 18:03:11,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:03:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:03:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:03:11,155 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:13,340 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-07-09 18:03:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:03:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:03:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:13,344 INFO L225 Difference]: With dead ends: 3268 [2021-07-09 18:03:13,344 INFO L226 Difference]: Without dead ends: 3049 [2021-07-09 18:03:13,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 2187.5ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-07-09 18:03:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-09 18:03:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-07-09 18:03:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-07-09 18:03:13,409 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-07-09 18:03:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:13,409 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-07-09 18:03:13,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-07-09 18:03:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:03:13,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:13,412 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:13,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:03:13,627 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-07-09 18:03:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:13,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648625162] [2021-07-09 18:03:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:13,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:13,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648625162] [2021-07-09 18:03:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648625162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:13,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029201090] [2021-07-09 18:03:13,734 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:13,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:13,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:03:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:14,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029201090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:14,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:14,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-07-09 18:03:14,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872869584] [2021-07-09 18:03:14,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:14,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:14,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:14,076 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:16,241 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-07-09 18:03:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:03:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:03:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:16,244 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 18:03:16,244 INFO L226 Difference]: Without dead ends: 2433 [2021-07-09 18:03:16,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 2051.1ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:03:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-09 18:03:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-07-09 18:03:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-07-09 18:03:16,291 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-07-09 18:03:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:16,291 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-07-09 18:03:16,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-07-09 18:03:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:16,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:16,293 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:16,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:16,524 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-07-09 18:03:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:16,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845568616] [2021-07-09 18:03:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:16,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:16,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845568616] [2021-07-09 18:03:16,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845568616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506253344] [2021-07-09 18:03:16,632 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:16,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:03:16,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:03:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:16,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506253344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:16,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:16,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 18:03:16,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160033200] [2021-07-09 18:03:16,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:03:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:03:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:03:16,750 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:16,827 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-07-09 18:03:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:03:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 43 [2021-07-09 18:03:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:16,830 INFO L225 Difference]: With dead ends: 2486 [2021-07-09 18:03:16,831 INFO L226 Difference]: Without dead ends: 2429 [2021-07-09 18:03:16,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:03:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-07-09 18:03:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-07-09 18:03:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-07-09 18:03:16,860 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-07-09 18:03:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:16,861 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-07-09 18:03:16,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-07-09 18:03:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:16,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:16,864 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:03:17,080 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-07-09 18:03:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695370829] [2021-07-09 18:03:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695370829] [2021-07-09 18:03:17,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695370829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415124052] [2021-07-09 18:03:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:17,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 18:03:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:03:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415124052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:17,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:03:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398255043] [2021-07-09 18:03:17,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:03:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:03:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:03:17,716 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:20,973 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-07-09 18:03:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:03:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:20,980 INFO L225 Difference]: With dead ends: 5082 [2021-07-09 18:03:20,981 INFO L226 Difference]: Without dead ends: 5049 [2021-07-09 18:03:20,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2371.3ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:03:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-07-09 18:03:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-07-09 18:03:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-07-09 18:03:21,043 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-07-09 18:03:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:21,043 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-07-09 18:03:21,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-07-09 18:03:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:21,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:21,047 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:21,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:03:21,257 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-07-09 18:03:21,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:21,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869307148] [2021-07-09 18:03:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:21,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869307148] [2021-07-09 18:03:21,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869307148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504089790] [2021-07-09 18:03:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:03:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504089790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:21,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:21,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-07-09 18:03:21,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877928817] [2021-07-09 18:03:21,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:03:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:03:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:03:21,900 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:24,523 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-07-09 18:03:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:03:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:24,528 INFO L225 Difference]: With dead ends: 4063 [2021-07-09 18:03:24,528 INFO L226 Difference]: Without dead ends: 4059 [2021-07-09 18:03:24,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2065.7ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:03:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-07-09 18:03:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-07-09 18:03:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-07-09 18:03:24,563 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-07-09 18:03:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:24,563 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-07-09 18:03:24,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-07-09 18:03:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:24,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:24,566 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:24,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:24,773 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-07-09 18:03:24,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:24,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213591723] [2021-07-09 18:03:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:24,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213591723] [2021-07-09 18:03:24,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213591723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601154038] [2021-07-09 18:03:24,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:24,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:24,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:25,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601154038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:25,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:25,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-07-09 18:03:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387389128] [2021-07-09 18:03:25,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:03:25,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:03:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:03:25,368 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:28,576 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-07-09 18:03:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:03:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:28,584 INFO L225 Difference]: With dead ends: 5894 [2021-07-09 18:03:28,585 INFO L226 Difference]: Without dead ends: 5846 [2021-07-09 18:03:28,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2460.6ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:03:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-07-09 18:03:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-07-09 18:03:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-07-09 18:03:28,636 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-07-09 18:03:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:28,636 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-07-09 18:03:28,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-07-09 18:03:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:28,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:28,640 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:28,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:03:28,857 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-07-09 18:03:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:28,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921015347] [2021-07-09 18:03:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:29,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921015347] [2021-07-09 18:03:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921015347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994214427] [2021-07-09 18:03:29,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:29,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 18:03:29,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994214427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:29,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:29,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-09 18:03:29,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534347991] [2021-07-09 18:03:29,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:03:29,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:03:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:03:29,459 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:32,482 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-07-09 18:03:32,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-09 18:03:32,482 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:32,493 INFO L225 Difference]: With dead ends: 7652 [2021-07-09 18:03:32,493 INFO L226 Difference]: Without dead ends: 7478 [2021-07-09 18:03:32,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2550.3ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-07-09 18:03:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-07-09 18:03:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-07-09 18:03:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-07-09 18:03:32,549 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-07-09 18:03:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:32,549 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-07-09 18:03:32,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-07-09 18:03:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:32,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:32,552 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:32,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:32,768 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-07-09 18:03:32,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:32,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146007648] [2021-07-09 18:03:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:32,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146007648] [2021-07-09 18:03:32,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146007648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830939202] [2021-07-09 18:03:32,931 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:32,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:32,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:03:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:33,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830939202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:33,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:33,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:03:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253909060] [2021-07-09 18:03:33,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:03:33,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:33,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:03:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:03:33,308 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:35,717 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-07-09 18:03:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:03:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:35,729 INFO L225 Difference]: With dead ends: 8464 [2021-07-09 18:03:35,729 INFO L226 Difference]: Without dead ends: 8230 [2021-07-09 18:03:35,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 2009.4ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:03:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-07-09 18:03:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-07-09 18:03:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-07-09 18:03:35,788 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-07-09 18:03:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:35,788 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-07-09 18:03:35,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-07-09 18:03:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:35,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:35,791 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:36,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:03:36,005 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-07-09 18:03:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:36,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974700556] [2021-07-09 18:03:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:36,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:36,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974700556] [2021-07-09 18:03:36,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974700556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:36,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871219542] [2021-07-09 18:03:36,169 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:36,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:03:36,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:03:36,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:36,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871219542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:36,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:36,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:03:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099217143] [2021-07-09 18:03:36,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:03:36,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:03:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:03:36,598 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:39,501 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-07-09 18:03:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:03:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:39,513 INFO L225 Difference]: With dead ends: 7868 [2021-07-09 18:03:39,513 INFO L226 Difference]: Without dead ends: 7508 [2021-07-09 18:03:39,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2524.7ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:03:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-07-09 18:03:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-07-09 18:03:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-07-09 18:03:39,572 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-07-09 18:03:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:39,572 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-07-09 18:03:39,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-07-09 18:03:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:03:39,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:39,575 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:39,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:39,791 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-07-09 18:03:39,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:39,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809778034] [2021-07-09 18:03:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:39,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:39,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809778034] [2021-07-09 18:03:39,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809778034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:39,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763616320] [2021-07-09 18:03:39,878 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:39,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:03:39,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:03:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:40,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763616320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:40,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:40,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-07-09 18:03:40,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405423916] [2021-07-09 18:03:40,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:03:40,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:03:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:03:40,302 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:44,070 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-07-09 18:03:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-09 18:03:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:03:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:44,077 INFO L225 Difference]: With dead ends: 5015 [2021-07-09 18:03:44,077 INFO L226 Difference]: Without dead ends: 5011 [2021-07-09 18:03:44,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3447.4ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-07-09 18:03:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-07-09 18:03:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-07-09 18:03:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-07-09 18:03:44,116 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-07-09 18:03:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:44,116 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-07-09 18:03:44,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-07-09 18:03:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:03:44,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:44,119 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:44,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:44,334 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-07-09 18:03:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:44,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69545945] [2021-07-09 18:03:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:44,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69545945] [2021-07-09 18:03:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69545945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405669884] [2021-07-09 18:03:44,499 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:44,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:03:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405669884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-07-09 18:03:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512454185] [2021-07-09 18:03:45,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:03:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:03:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:03:45,035 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:48,066 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-07-09 18:03:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:03:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:03:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:48,070 INFO L225 Difference]: With dead ends: 3620 [2021-07-09 18:03:48,070 INFO L226 Difference]: Without dead ends: 3422 [2021-07-09 18:03:48,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2761.1ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-07-09 18:03:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-07-09 18:03:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-07-09 18:03:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-07-09 18:03:48,095 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-07-09 18:03:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:48,096 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-07-09 18:03:48,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-07-09 18:03:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:03:48,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:48,098 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:48,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:48,313 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-07-09 18:03:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014700646] [2021-07-09 18:03:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:48,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014700646] [2021-07-09 18:03:48,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014700646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061382952] [2021-07-09 18:03:48,394 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:48,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:48,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061382952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:48,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-07-09 18:03:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014524761] [2021-07-09 18:03:48,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:03:48,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:03:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:03:48,801 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:51,608 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-07-09 18:03:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:03:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:03:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:51,613 INFO L225 Difference]: With dead ends: 3140 [2021-07-09 18:03:51,613 INFO L226 Difference]: Without dead ends: 3136 [2021-07-09 18:03:51,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2644.8ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:03:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-07-09 18:03:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-07-09 18:03:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-07-09 18:03:51,641 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-07-09 18:03:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:51,641 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-07-09 18:03:51,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-07-09 18:03:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:03:51,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:51,644 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:51,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:51,860 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-07-09 18:03:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:51,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11000935] [2021-07-09 18:03:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:03:51,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11000935] [2021-07-09 18:03:51,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11000935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091103961] [2021-07-09 18:03:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:51,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 18:03:51,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:03:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091103961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:52,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-09 18:03:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144874171] [2021-07-09 18:03:52,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:03:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:03:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:03:52,402 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:55,324 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-07-09 18:03:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 18:03:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:03:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:55,333 INFO L225 Difference]: With dead ends: 6205 [2021-07-09 18:03:55,333 INFO L226 Difference]: Without dead ends: 6205 [2021-07-09 18:03:55,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2628.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:03:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-07-09 18:03:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-07-09 18:03:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-07-09 18:03:55,384 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-07-09 18:03:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:55,384 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-07-09 18:03:55,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-07-09 18:03:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:03:55,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:55,389 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:55,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:03:55,605 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-07-09 18:03:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:55,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301209731] [2021-07-09 18:03:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:55,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:55,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301209731] [2021-07-09 18:03:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301209731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:55,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918404136] [2021-07-09 18:03:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:55,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:03:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918404136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:55,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:55,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 18:03:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790868803] [2021-07-09 18:03:55,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:03:55,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:03:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:03:55,792 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:55,899 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-07-09 18:03:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:03:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 47 [2021-07-09 18:03:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:55,906 INFO L225 Difference]: With dead ends: 4861 [2021-07-09 18:03:55,906 INFO L226 Difference]: Without dead ends: 4798 [2021-07-09 18:03:55,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:03:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-07-09 18:03:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-07-09 18:03:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-07-09 18:03:55,970 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-07-09 18:03:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:55,970 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-07-09 18:03:55,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-07-09 18:03:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:03:55,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:55,976 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:56,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:56,193 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-07-09 18:03:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465146484] [2021-07-09 18:03:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:56,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:56,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465146484] [2021-07-09 18:03:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465146484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:56,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986639504] [2021-07-09 18:03:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:56,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 18:03:56,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:03:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986639504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:57,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:57,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-09 18:03:57,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549690881] [2021-07-09 18:03:57,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:03:57,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:03:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:03:57,153 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,262 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-07-09 18:04:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:04:00,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,271 INFO L225 Difference]: With dead ends: 5913 [2021-07-09 18:04:00,271 INFO L226 Difference]: Without dead ends: 5907 [2021-07-09 18:04:00,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2470.1ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:04:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-07-09 18:04:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-07-09 18:04:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-07-09 18:04:00,366 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-07-09 18:04:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,366 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-07-09 18:04:00,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-07-09 18:04:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:00,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,372 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:00,589 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-07-09 18:04:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882595377] [2021-07-09 18:04:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882595377] [2021-07-09 18:04:00,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882595377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:00,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148157014] [2021-07-09 18:04:00,860 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:00,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 18:04:00,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:04:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148157014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:01,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-07-09 18:04:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957697542] [2021-07-09 18:04:01,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:04:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:04:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:04:01,495 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:05,408 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-07-09 18:04:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:04:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:05,421 INFO L225 Difference]: With dead ends: 8676 [2021-07-09 18:04:05,422 INFO L226 Difference]: Without dead ends: 8652 [2021-07-09 18:04:05,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2843.0ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:04:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-07-09 18:04:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-07-09 18:04:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-07-09 18:04:05,500 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-07-09 18:04:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:05,500 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-07-09 18:04:05,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-07-09 18:04:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:05,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:05,506 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:05,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:05,724 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-07-09 18:04:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:05,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988986476] [2021-07-09 18:04:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:05,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988986476] [2021-07-09 18:04:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988986476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017760699] [2021-07-09 18:04:05,909 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:04:05,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:06,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017760699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:06,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:06,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-07-09 18:04:06,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322403789] [2021-07-09 18:04:06,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:06,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:06,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:06,527 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:09,956 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-07-09 18:04:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:04:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:09,964 INFO L225 Difference]: With dead ends: 6903 [2021-07-09 18:04:09,964 INFO L226 Difference]: Without dead ends: 6899 [2021-07-09 18:04:09,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2313.8ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:04:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-09 18:04:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-07-09 18:04:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-07-09 18:04:10,027 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-07-09 18:04:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:10,027 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-07-09 18:04:10,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-07-09 18:04:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:10,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:10,035 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:10,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 18:04:10,252 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-07-09 18:04:10,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:10,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064933287] [2021-07-09 18:04:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064933287] [2021-07-09 18:04:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064933287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742588299] [2021-07-09 18:04:10,406 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:10,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:10,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:04:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:10,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742588299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:10,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:10,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-09 18:04:10,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600488382] [2021-07-09 18:04:10,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:04:10,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:10,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:04:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:04:10,771 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:14,839 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-07-09 18:04:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:04:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:14,855 INFO L225 Difference]: With dead ends: 10549 [2021-07-09 18:04:14,855 INFO L226 Difference]: Without dead ends: 10501 [2021-07-09 18:04:14,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 2809.0ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 18:04:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-07-09 18:04:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-07-09 18:04:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-07-09 18:04:14,952 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-07-09 18:04:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:14,952 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-07-09 18:04:14,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-07-09 18:04:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:14,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:14,957 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:15,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:04:15,173 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-07-09 18:04:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:15,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052593573] [2021-07-09 18:04:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:15,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052593573] [2021-07-09 18:04:15,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052593573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712381636] [2021-07-09 18:04:15,364 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 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 [2021-07-09 18:04:15,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 18:04:15,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:15,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:04:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:15,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712381636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:15,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:15,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-07-09 18:04:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56807351] [2021-07-09 18:04:15,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:04:15,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:04:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:04:15,816 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:19,832 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-07-09 18:04:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:04:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:19,849 INFO L225 Difference]: With dead ends: 12102 [2021-07-09 18:04:19,849 INFO L226 Difference]: Without dead ends: 12024 [2021-07-09 18:04:19,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 2952.6ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 18:04:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-07-09 18:04:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-07-09 18:04:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-07-09 18:04:19,955 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-07-09 18:04:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:19,955 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-07-09 18:04:19,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-07-09 18:04:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:19,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:19,959 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:20,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:20,166 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:20,166 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-07-09 18:04:20,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:20,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77426624] [2021-07-09 18:04:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:20,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77426624] [2021-07-09 18:04:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77426624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857260251] [2021-07-09 18:04:20,341 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:20,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:20,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:04:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:20,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857260251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:20,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-07-09 18:04:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074019544] [2021-07-09 18:04:20,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:04:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:04:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:04:20,839 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:23,623 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-07-09 18:04:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:04:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:23,644 INFO L225 Difference]: With dead ends: 14421 [2021-07-09 18:04:23,644 INFO L226 Difference]: Without dead ends: 14229 [2021-07-09 18:04:23,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2364.2ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:04:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-07-09 18:04:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-07-09 18:04:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-07-09 18:04:23,750 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-07-09 18:04:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:23,750 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-07-09 18:04:23,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-07-09 18:04:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:23,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:23,754 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:23,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-09 18:04:23,972 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-07-09 18:04:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:23,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208491779] [2021-07-09 18:04:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:24,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208491779] [2021-07-09 18:04:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208491779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639470741] [2021-07-09 18:04:24,159 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:24,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:04:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639470741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:24,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:24,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-07-09 18:04:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798081692] [2021-07-09 18:04:24,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:04:24,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:04:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:04:24,758 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:28,333 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-07-09 18:04:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-07-09 18:04:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:28,355 INFO L225 Difference]: With dead ends: 14220 [2021-07-09 18:04:28,356 INFO L226 Difference]: Without dead ends: 13917 [2021-07-09 18:04:28,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2977.9ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-07-09 18:04:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-07-09 18:04:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-07-09 18:04:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-07-09 18:04:28,460 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-07-09 18:04:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:28,460 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-07-09 18:04:28,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-07-09 18:04:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:28,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:28,464 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:28,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:28,681 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:28,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-07-09 18:04:28,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:28,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019162190] [2021-07-09 18:04:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:28,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019162190] [2021-07-09 18:04:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019162190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356673782] [2021-07-09 18:04:28,910 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:28,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:04:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:04:28,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:29,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356673782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:29,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:29,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:04:29,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593645023] [2021-07-09 18:04:29,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:04:29,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:04:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:04:29,426 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:32,870 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-07-09 18:04:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:04:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:32,888 INFO L225 Difference]: With dead ends: 13609 [2021-07-09 18:04:32,888 INFO L226 Difference]: Without dead ends: 13078 [2021-07-09 18:04:32,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 3101.4ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-07-09 18:04:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-07-09 18:04:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-07-09 18:04:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-07-09 18:04:32,985 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-07-09 18:04:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:32,985 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-07-09 18:04:32,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-07-09 18:04:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:04:32,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:32,990 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:33,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-09 18:04:33,206 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-07-09 18:04:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:33,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527006179] [2021-07-09 18:04:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:33,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:33,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527006179] [2021-07-09 18:04:33,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527006179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:33,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401799457] [2021-07-09 18:04:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:04:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401799457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-07-09 18:04:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889205213] [2021-07-09 18:04:33,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:04:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:04:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:04:33,757 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:36,773 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-07-09 18:04:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:04:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:04:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:36,786 INFO L225 Difference]: With dead ends: 9014 [2021-07-09 18:04:36,786 INFO L226 Difference]: Without dead ends: 9010 [2021-07-09 18:04:36,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2696.2ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:04:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-07-09 18:04:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-07-09 18:04:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-07-09 18:04:36,856 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-07-09 18:04:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:36,856 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-07-09 18:04:36,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-07-09 18:04:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:04:36,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:36,860 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:37,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:37,076 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-07-09 18:04:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:37,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986868395] [2021-07-09 18:04:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:37,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:37,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986868395] [2021-07-09 18:04:37,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986868395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:37,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130710913] [2021-07-09 18:04:37,271 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:37,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 18:04:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:37,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130710913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:37,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:37,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-07-09 18:04:37,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96174121] [2021-07-09 18:04:37,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:04:37,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:04:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:04:37,828 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:41,671 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-07-09 18:04:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-09 18:04:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-09 18:04:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:41,679 INFO L225 Difference]: With dead ends: 6691 [2021-07-09 18:04:41,679 INFO L226 Difference]: Without dead ends: 6421 [2021-07-09 18:04:41,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3475.4ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-07-09 18:04:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-07-09 18:04:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-07-09 18:04:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-07-09 18:04:41,732 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-07-09 18:04:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:41,732 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-07-09 18:04:41,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-07-09 18:04:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:04:41,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:41,736 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:41,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-09 18:04:41,941 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-07-09 18:04:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:41,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511110372] [2021-07-09 18:04:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511110372] [2021-07-09 18:04:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511110372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018177347] [2021-07-09 18:04:42,074 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:42,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 18:04:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:04:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018177347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:42,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-07-09 18:04:42,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703435875] [2021-07-09 18:04:42,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:42,593 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:48,006 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-07-09 18:04:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-07-09 18:04:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-09 18:04:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:48,017 INFO L225 Difference]: With dead ends: 8254 [2021-07-09 18:04:48,017 INFO L226 Difference]: Without dead ends: 8250 [2021-07-09 18:04:48,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 4930.8ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-07-09 18:04:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-07-09 18:04:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-07-09 18:04:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-07-09 18:04:48,117 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-07-09 18:04:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:48,117 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-07-09 18:04:48,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-07-09 18:04:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:04:48,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:48,121 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:48,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:48,337 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-07-09 18:04:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:48,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936151266] [2021-07-09 18:04:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:48,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:48,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936151266] [2021-07-09 18:04:48,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936151266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:48,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103272855] [2021-07-09 18:04:48,432 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:48,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:04:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:48,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103272855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:48,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:48,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 18:04:48,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662029751] [2021-07-09 18:04:48,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:04:48,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:04:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:48,527 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:48,641 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-07-09 18:04:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:04:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:04:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:48,649 INFO L225 Difference]: With dead ends: 5889 [2021-07-09 18:04:48,649 INFO L226 Difference]: Without dead ends: 5820 [2021-07-09 18:04:48,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-07-09 18:04:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-07-09 18:04:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-07-09 18:04:48,719 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-07-09 18:04:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:48,719 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-07-09 18:04:48,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-07-09 18:04:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:04:48,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:48,724 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 18:04:48,940 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-07-09 18:04:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:48,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532427546] [2021-07-09 18:04:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:49,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532427546] [2021-07-09 18:04:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532427546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692553972] [2021-07-09 18:04:49,251 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:49,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 18:04:49,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:49,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:04:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:50,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692553972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:50,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:50,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-09 18:04:50,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810828815] [2021-07-09 18:04:50,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:04:50,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:04:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:04:50,047 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:53,673 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-07-09 18:04:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:04:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:04:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:53,683 INFO L225 Difference]: With dead ends: 7094 [2021-07-09 18:04:53,683 INFO L226 Difference]: Without dead ends: 7088 [2021-07-09 18:04:53,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2940.4ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-07-09 18:04:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-07-09 18:04:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-07-09 18:04:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-07-09 18:04:53,751 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-07-09 18:04:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-07-09 18:04:53,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-07-09 18:04:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:04:53,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:53,756 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:53,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:04:53,972 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-07-09 18:04:53,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:53,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133065620] [2021-07-09 18:04:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:54,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133065620] [2021-07-09 18:04:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133065620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806385711] [2021-07-09 18:04:54,196 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:54,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 18:04:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:04:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:54,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806385711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:54,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:54,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-07-09 18:04:54,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658945593] [2021-07-09 18:04:54,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:04:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:04:54,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:04:54,837 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:59,452 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-07-09 18:04:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-09 18:04:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:04:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:59,466 INFO L225 Difference]: With dead ends: 10585 [2021-07-09 18:04:59,466 INFO L226 Difference]: Without dead ends: 10561 [2021-07-09 18:04:59,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 3179.9ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-07-09 18:04:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-07-09 18:04:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-07-09 18:04:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-07-09 18:04:59,558 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-07-09 18:04:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:59,558 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-07-09 18:04:59,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-07-09 18:04:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:04:59,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:59,563 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:59,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 18:04:59,773 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-07-09 18:04:59,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:59,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996943305] [2021-07-09 18:04:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:59,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:59,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996943305] [2021-07-09 18:04:59,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996943305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:59,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126748641] [2021-07-09 18:04:59,956 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:04:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:00,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126748641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:00,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:00,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-07-09 18:05:00,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612931660] [2021-07-09 18:05:00,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:05:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:05:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:00,668 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:04,460 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-07-09 18:05:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:05:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:04,500 INFO L225 Difference]: With dead ends: 8201 [2021-07-09 18:05:04,501 INFO L226 Difference]: Without dead ends: 8197 [2021-07-09 18:05:04,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2826.2ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:05:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-07-09 18:05:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-07-09 18:05:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-07-09 18:05:04,570 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-07-09 18:05:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:04,570 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-07-09 18:05:04,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-07-09 18:05:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:04,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:04,575 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:04,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:04,791 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-07-09 18:05:04,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:04,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457509096] [2021-07-09 18:05:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:04,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:04,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457509096] [2021-07-09 18:05:04,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457509096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:04,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701485777] [2021-07-09 18:05:04,976 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:05,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701485777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:05,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:05,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-07-09 18:05:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128710113] [2021-07-09 18:05:05,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:05:05,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:05:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:05:05,594 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:11,240 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-07-09 18:05:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-07-09 18:05:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:11,260 INFO L225 Difference]: With dead ends: 12411 [2021-07-09 18:05:11,261 INFO L226 Difference]: Without dead ends: 12363 [2021-07-09 18:05:11,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3973.7ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-07-09 18:05:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-07-09 18:05:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-07-09 18:05:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-07-09 18:05:11,367 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-07-09 18:05:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:11,367 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-07-09 18:05:11,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-07-09 18:05:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:11,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:11,373 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:11,581 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-07-09 18:05:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179508623] [2021-07-09 18:05:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:11,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179508623] [2021-07-09 18:05:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179508623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955484309] [2021-07-09 18:05:11,768 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 18:05:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:12,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955484309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:12,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:12,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-07-09 18:05:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222528634] [2021-07-09 18:05:12,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:05:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:05:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:05:12,286 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:17,569 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-07-09 18:05:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-09 18:05:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:17,593 INFO L225 Difference]: With dead ends: 15077 [2021-07-09 18:05:17,593 INFO L226 Difference]: Without dead ends: 14999 [2021-07-09 18:05:17,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 3854.0ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-07-09 18:05:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-07-09 18:05:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-07-09 18:05:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-07-09 18:05:17,714 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-07-09 18:05:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:17,714 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-07-09 18:05:17,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-07-09 18:05:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:17,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:17,720 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:17,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 18:05:17,929 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-07-09 18:05:17,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:17,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374807804] [2021-07-09 18:05:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:18,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:18,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374807804] [2021-07-09 18:05:18,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374807804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:18,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121382511] [2021-07-09 18:05:18,148 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:18,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:05:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:18,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121382511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:18,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:18,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-09 18:05:18,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368214220] [2021-07-09 18:05:18,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:05:18,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:05:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:05:18,728 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:23,579 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-07-09 18:05:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-07-09 18:05:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:23,600 INFO L225 Difference]: With dead ends: 16843 [2021-07-09 18:05:23,600 INFO L226 Difference]: Without dead ends: 16573 [2021-07-09 18:05:23,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3712.4ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-07-09 18:05:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-07-09 18:05:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-07-09 18:05:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-07-09 18:05:23,715 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-07-09 18:05:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:23,715 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-07-09 18:05:23,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-07-09 18:05:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:23,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:23,720 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:23,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-09 18:05:23,929 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-07-09 18:05:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:23,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888657083] [2021-07-09 18:05:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:24,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888657083] [2021-07-09 18:05:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888657083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668517361] [2021-07-09 18:05:24,142 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:24,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 18:05:24,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:05:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668517361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:24,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:24,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-07-09 18:05:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742429539] [2021-07-09 18:05:24,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:05:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:05:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:05:24,729 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:28,811 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-07-09 18:05:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 18:05:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:28,841 INFO L225 Difference]: With dead ends: 18875 [2021-07-09 18:05:28,841 INFO L226 Difference]: Without dead ends: 18587 [2021-07-09 18:05:28,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 3378.2ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-07-09 18:05:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-07-09 18:05:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-07-09 18:05:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-07-09 18:05:28,987 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-07-09 18:05:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:28,987 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-07-09 18:05:28,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-07-09 18:05:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:28,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:28,992 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:29,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:29,208 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-07-09 18:05:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656468979] [2021-07-09 18:05:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:29,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:29,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656468979] [2021-07-09 18:05:29,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656468979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:29,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602571381] [2021-07-09 18:05:29,424 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:29,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 18:05:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:05:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602571381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:30,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-07-09 18:05:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684731473] [2021-07-09 18:05:30,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:05:30,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:30,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:05:30,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:05:30,091 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:34,435 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-07-09 18:05:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-07-09 18:05:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:34,457 INFO L225 Difference]: With dead ends: 16588 [2021-07-09 18:05:34,457 INFO L226 Difference]: Without dead ends: 16174 [2021-07-09 18:05:34,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3688.1ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-07-09 18:05:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-07-09 18:05:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-07-09 18:05:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-07-09 18:05:34,573 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-07-09 18:05:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:34,574 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-07-09 18:05:34,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-07-09 18:05:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:05:34,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:34,578 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:34,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:34,794 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-07-09 18:05:34,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:34,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816991401] [2021-07-09 18:05:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:35,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816991401] [2021-07-09 18:05:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816991401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16017919] [2021-07-09 18:05:35,012 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:05:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16017919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-09 18:05:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095455168] [2021-07-09 18:05:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:05:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:05:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:05:35,575 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:39,383 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-07-09 18:05:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-09 18:05:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:05:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:39,410 INFO L225 Difference]: With dead ends: 16800 [2021-07-09 18:05:39,410 INFO L226 Difference]: Without dead ends: 16146 [2021-07-09 18:05:39,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3365.9ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-07-09 18:05:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-07-09 18:05:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-07-09 18:05:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-07-09 18:05:39,541 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-07-09 18:05:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:39,541 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-07-09 18:05:39,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-07-09 18:05:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 18:05:39,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:39,546 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:39,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:39,761 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-07-09 18:05:39,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:39,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506377902] [2021-07-09 18:05:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:39,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506377902] [2021-07-09 18:05:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506377902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818670830] [2021-07-09 18:05:39,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:39,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:39,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:39,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:05:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:40,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818670830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:40,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:40,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-09 18:05:40,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803782426] [2021-07-09 18:05:40,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:05:40,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:05:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:05:40,594 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:45,370 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-07-09 18:05:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-07-09 18:05:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 18:05:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:45,379 INFO L225 Difference]: With dead ends: 6738 [2021-07-09 18:05:45,379 INFO L226 Difference]: Without dead ends: 6426 [2021-07-09 18:05:45,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 4303.3ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-07-09 18:05:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-07-09 18:05:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-07-09 18:05:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-07-09 18:05:45,436 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-07-09 18:05:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:45,436 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-07-09 18:05:45,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-07-09 18:05:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 18:05:45,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:45,440 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:45,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:45,653 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-07-09 18:05:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:45,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166726304] [2021-07-09 18:05:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:45,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:45,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166726304] [2021-07-09 18:05:45,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166726304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:45,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576623902] [2021-07-09 18:05:45,758 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:45,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 18:05:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:05:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:46,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576623902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:46,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:46,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-07-09 18:05:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563904894] [2021-07-09 18:05:46,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:05:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:05:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:05:46,367 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:54,075 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-07-09 18:05:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-07-09 18:05:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 18:05:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:54,082 INFO L225 Difference]: With dead ends: 6316 [2021-07-09 18:05:54,082 INFO L226 Difference]: Without dead ends: 6312 [2021-07-09 18:05:54,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 7197.6ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-07-09 18:05:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-07-09 18:05:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-07-09 18:05:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-07-09 18:05:54,140 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-07-09 18:05:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:54,141 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-07-09 18:05:54,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-07-09 18:05:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:05:54,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:54,145 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:54,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:54,361 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-07-09 18:05:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:54,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178640847] [2021-07-09 18:05:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:54,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178640847] [2021-07-09 18:05:54,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178640847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350741723] [2021-07-09 18:05:54,472 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:54,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:05:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350741723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:54,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 18:05:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281828607] [2021-07-09 18:05:54,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:05:54,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:05:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:05:54,576 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:54,730 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-07-09 18:05:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:05:54,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:05:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:54,738 INFO L225 Difference]: With dead ends: 6109 [2021-07-09 18:05:54,739 INFO L226 Difference]: Without dead ends: 6034 [2021-07-09 18:05:54,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:05:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-07-09 18:05:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-07-09 18:05:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-07-09 18:05:54,816 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-07-09 18:05:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:54,817 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-07-09 18:05:54,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-07-09 18:05:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:05:54,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:54,822 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:55,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:55,037 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-07-09 18:05:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:55,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642164324] [2021-07-09 18:05:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:55,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642164324] [2021-07-09 18:05:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642164324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243297807] [2021-07-09 18:05:55,387 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:55,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 18:05:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:05:55,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243297807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-09 18:05:56,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657400177] [2021-07-09 18:05:56,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:05:56,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:05:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:05:56,159 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:00,657 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-07-09 18:06:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:06:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:00,668 INFO L225 Difference]: With dead ends: 7325 [2021-07-09 18:06:00,668 INFO L226 Difference]: Without dead ends: 7319 [2021-07-09 18:06:00,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3247.0ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:06:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-07-09 18:06:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-07-09 18:06:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-07-09 18:06:00,752 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-07-09 18:06:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:00,752 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-07-09 18:06:00,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-07-09 18:06:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:00,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:00,757 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:00,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-09 18:06:00,959 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-07-09 18:06:00,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:00,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370121585] [2021-07-09 18:06:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370121585] [2021-07-09 18:06:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370121585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325884843] [2021-07-09 18:06:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:01,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 18:06:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:06:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:01,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325884843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:01,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:01,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-07-09 18:06:01,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405203711] [2021-07-09 18:06:01,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:06:01,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:06:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:06:01,966 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:08,034 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-07-09 18:06:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 18:06:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:08,048 INFO L225 Difference]: With dead ends: 10773 [2021-07-09 18:06:08,048 INFO L226 Difference]: Without dead ends: 10749 [2021-07-09 18:06:08,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3606.3ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-07-09 18:06:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-07-09 18:06:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-07-09 18:06:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-07-09 18:06:08,138 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-07-09 18:06:08,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:08,139 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-07-09 18:06:08,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-07-09 18:06:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:08,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:08,144 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:08,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:08,353 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-07-09 18:06:08,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:08,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082915836] [2021-07-09 18:06:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:08,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:08,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082915836] [2021-07-09 18:06:08,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082915836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:08,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434448574] [2021-07-09 18:06:08,559 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:06:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434448574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:09,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-07-09 18:06:09,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904581794] [2021-07-09 18:06:09,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:06:09,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:06:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:06:09,304 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:13,850 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-07-09 18:06:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:06:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:13,862 INFO L225 Difference]: With dead ends: 8165 [2021-07-09 18:06:13,862 INFO L226 Difference]: Without dead ends: 8161 [2021-07-09 18:06:13,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 3143.6ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-07-09 18:06:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-07-09 18:06:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-07-09 18:06:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-07-09 18:06:13,942 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-07-09 18:06:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:13,942 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-07-09 18:06:13,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-07-09 18:06:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:13,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:13,947 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:14,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,163 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:14,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-07-09 18:06:14,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:14,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866974881] [2021-07-09 18:06:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:14,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:14,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866974881] [2021-07-09 18:06:14,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866974881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:14,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947673033] [2021-07-09 18:06:14,378 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:06:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947673033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:15,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-07-09 18:06:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323701068] [2021-07-09 18:06:15,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:06:15,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:06:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:06:15,062 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:21,789 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-07-09 18:06:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-07-09 18:06:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:21,807 INFO L225 Difference]: With dead ends: 12946 [2021-07-09 18:06:21,807 INFO L226 Difference]: Without dead ends: 12898 [2021-07-09 18:06:21,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4441.4ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-07-09 18:06:21,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-07-09 18:06:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-07-09 18:06:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-07-09 18:06:21,907 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-07-09 18:06:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:21,907 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-07-09 18:06:21,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-07-09 18:06:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:21,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:21,912 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:22,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 18:06:22,128 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-07-09 18:06:22,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:22,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624051190] [2021-07-09 18:06:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:22,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624051190] [2021-07-09 18:06:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624051190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063309743] [2021-07-09 18:06:22,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:22,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 18:06:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:22,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:06:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063309743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:23,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-07-09 18:06:23,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369435543] [2021-07-09 18:06:23,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:06:23,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:23,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:06:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:06:23,072 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:30,260 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-07-09 18:06:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-07-09 18:06:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:30,283 INFO L225 Difference]: With dead ends: 14970 [2021-07-09 18:06:30,283 INFO L226 Difference]: Without dead ends: 14892 [2021-07-09 18:06:30,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 5246.0ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-07-09 18:06:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-07-09 18:06:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-07-09 18:06:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-07-09 18:06:30,413 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-07-09 18:06:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:30,413 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-07-09 18:06:30,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-07-09 18:06:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:30,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:30,417 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:30,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:30,634 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-07-09 18:06:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:30,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074678143] [2021-07-09 18:06:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:30,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074678143] [2021-07-09 18:06:30,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074678143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700734021] [2021-07-09 18:06:30,853 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:30,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:30,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:06:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:31,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700734021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:31,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:31,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-07-09 18:06:31,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981333283] [2021-07-09 18:06:31,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:06:31,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:31,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:06:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:06:31,453 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:37,955 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-07-09 18:06:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-09 18:06:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:37,985 INFO L225 Difference]: With dead ends: 18186 [2021-07-09 18:06:37,985 INFO L226 Difference]: Without dead ends: 18072 [2021-07-09 18:06:37,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4772.9ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-07-09 18:06:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-07-09 18:06:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-07-09 18:06:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-07-09 18:06:38,114 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-07-09 18:06:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:38,114 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-07-09 18:06:38,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-07-09 18:06:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:38,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:38,119 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:38,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 18:06:38,321 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-07-09 18:06:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:38,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425388055] [2021-07-09 18:06:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425388055] [2021-07-09 18:06:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425388055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064700536] [2021-07-09 18:06:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:38,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 18:06:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:06:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064700536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:39,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:39,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-07-09 18:06:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375456544] [2021-07-09 18:06:39,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:06:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:06:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:06:39,219 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:43,451 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-07-09 18:06:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-09 18:06:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:43,479 INFO L225 Difference]: With dead ends: 19113 [2021-07-09 18:06:43,480 INFO L226 Difference]: Without dead ends: 18873 [2021-07-09 18:06:43,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3378.2ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-07-09 18:06:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-07-09 18:06:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-07-09 18:06:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-07-09 18:06:43,639 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-07-09 18:06:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:43,639 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-07-09 18:06:43,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-07-09 18:06:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:43,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:43,644 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-07-09 18:06:43,861 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-07-09 18:06:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:43,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780711869] [2021-07-09 18:06:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780711869] [2021-07-09 18:06:44,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780711869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223905264] [2021-07-09 18:06:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:44,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 18:06:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:06:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223905264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:44,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-07-09 18:06:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18978363] [2021-07-09 18:06:44,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-09 18:06:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-09 18:06:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:06:44,851 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:49,541 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-07-09 18:06:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-09 18:06:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:49,568 INFO L225 Difference]: With dead ends: 18758 [2021-07-09 18:06:49,569 INFO L226 Difference]: Without dead ends: 18353 [2021-07-09 18:06:49,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3964.3ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-07-09 18:06:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-07-09 18:06:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-07-09 18:06:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-07-09 18:06:49,736 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-07-09 18:06:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-07-09 18:06:49,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-07-09 18:06:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:49,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:49,741 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-09 18:06:49,957 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-07-09 18:06:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914175655] [2021-07-09 18:06:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:50,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914175655] [2021-07-09 18:06:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914175655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591247696] [2021-07-09 18:06:50,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:06:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591247696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:50,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-07-09 18:06:50,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93498125] [2021-07-09 18:06:50,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-09 18:06:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-09 18:06:50,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:06:50,825 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:55,300 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-07-09 18:06:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-07-09 18:06:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:06:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:55,328 INFO L225 Difference]: With dead ends: 18854 [2021-07-09 18:06:55,329 INFO L226 Difference]: Without dead ends: 18251 [2021-07-09 18:06:55,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3785.7ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-07-09 18:06:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-07-09 18:06:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-07-09 18:06:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-07-09 18:06:55,471 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-07-09 18:06:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:55,471 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-07-09 18:06:55,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-07-09 18:06:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:06:55,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:55,475 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:55,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:55,683 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-07-09 18:06:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:55,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347518426] [2021-07-09 18:06:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:56,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347518426] [2021-07-09 18:06:56,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347518426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934912412] [2021-07-09 18:06:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:56,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:06:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934912412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:56,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-09 18:06:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917393549] [2021-07-09 18:06:56,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:06:56,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:56,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:06:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:06:56,626 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:01,629 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-07-09 18:07:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-09 18:07:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:07:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:01,650 INFO L225 Difference]: With dead ends: 15764 [2021-07-09 18:07:01,650 INFO L226 Difference]: Without dead ends: 14963 [2021-07-09 18:07:01,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 4438.0ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-07-09 18:07:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-07-09 18:07:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-07-09 18:07:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-07-09 18:07:01,762 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-07-09 18:07:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:01,762 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-07-09 18:07:01,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-07-09 18:07:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:07:01,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:01,766 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:01,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-09 18:07:01,969 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-07-09 18:07:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540766785] [2021-07-09 18:07:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540766785] [2021-07-09 18:07:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540766785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480976622] [2021-07-09 18:07:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:02,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 18:07:02,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:02,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:07:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480976622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-07-09 18:07:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417430886] [2021-07-09 18:07:02,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:07:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:07:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:07:02,816 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:10,283 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-07-09 18:07:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-07-09 18:07:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:07:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:10,296 INFO L225 Difference]: With dead ends: 11259 [2021-07-09 18:07:10,297 INFO L226 Difference]: Without dead ends: 11255 [2021-07-09 18:07:10,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6775.6ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-07-09 18:07:10,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-07-09 18:07:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-07-09 18:07:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-07-09 18:07:10,387 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-07-09 18:07:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:10,388 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-07-09 18:07:10,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-07-09 18:07:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 18:07:10,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:10,393 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:10,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 18:07:10,597 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-07-09 18:07:10,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:10,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477093795] [2021-07-09 18:07:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:10,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477093795] [2021-07-09 18:07:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477093795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204980610] [2021-07-09 18:07:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:10,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:07:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:11,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204980610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:11,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:11,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-07-09 18:07:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547614088] [2021-07-09 18:07:11,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-09 18:07:11,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-09 18:07:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:07:11,574 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:17,294 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-07-09 18:07:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-07-09 18:07:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 18:07:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:17,303 INFO L225 Difference]: With dead ends: 7916 [2021-07-09 18:07:17,303 INFO L226 Difference]: Without dead ends: 7538 [2021-07-09 18:07:17,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 5077.2ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-07-09 18:07:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-07-09 18:07:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-07-09 18:07:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-07-09 18:07:17,376 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-07-09 18:07:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:17,377 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-07-09 18:07:17,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-07-09 18:07:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 18:07:17,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:17,381 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:17,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:17,597 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:17,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-07-09 18:07:17,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:17,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464441209] [2021-07-09 18:07:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:17,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464441209] [2021-07-09 18:07:17,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464441209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799934714] [2021-07-09 18:07:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:17,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 18:07:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:17,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:07:17,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:18,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799934714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:18,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:18,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-07-09 18:07:18,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633065811] [2021-07-09 18:07:18,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:07:18,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:18,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:07:18,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:07:18,391 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:26,721 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-07-09 18:07:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-07-09 18:07:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 18:07:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:26,730 INFO L225 Difference]: With dead ends: 7450 [2021-07-09 18:07:26,730 INFO L226 Difference]: Without dead ends: 7446 [2021-07-09 18:07:26,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 7759.3ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-07-09 18:07:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-07-09 18:07:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-07-09 18:07:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-07-09 18:07:26,801 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-07-09 18:07:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:26,801 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-07-09 18:07:26,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-07-09 18:07:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:07:26,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:26,806 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:27,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:27,022 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-07-09 18:07:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:27,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933479676] [2021-07-09 18:07:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:27,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933479676] [2021-07-09 18:07:27,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933479676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120358559] [2021-07-09 18:07:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:27,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 18:07:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:07:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:27,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120358559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:27,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:27,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-07-09 18:07:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280154578] [2021-07-09 18:07:27,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:07:27,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:07:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:07:27,322 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:27,529 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-07-09 18:07:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:07:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:07:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:27,539 INFO L225 Difference]: With dead ends: 7171 [2021-07-09 18:07:27,540 INFO L226 Difference]: Without dead ends: 7081 [2021-07-09 18:07:27,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:07:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-07-09 18:07:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-07-09 18:07:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-07-09 18:07:27,640 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-07-09 18:07:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:27,641 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-07-09 18:07:27,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-07-09 18:07:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:07:27,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:27,646 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:27,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:27,862 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-07-09 18:07:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:27,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372845456] [2021-07-09 18:07:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:28,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372845456] [2021-07-09 18:07:28,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372845456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509519395] [2021-07-09 18:07:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:07:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:28,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509519395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:28,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:28,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-07-09 18:07:28,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673973487] [2021-07-09 18:07:28,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:07:28,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:07:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:07:28,901 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:35,666 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-07-09 18:07:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-09 18:07:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:07:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:35,686 INFO L225 Difference]: With dead ends: 12343 [2021-07-09 18:07:35,686 INFO L226 Difference]: Without dead ends: 12319 [2021-07-09 18:07:35,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 4357.5ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-07-09 18:07:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-07-09 18:07:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-07-09 18:07:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-07-09 18:07:35,818 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-07-09 18:07:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:35,820 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-07-09 18:07:35,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-07-09 18:07:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:07:35,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:35,827 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:36,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-07-09 18:07:36,040 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:36,040 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-07-09 18:07:36,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969760191] [2021-07-09 18:07:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:36,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969760191] [2021-07-09 18:07:36,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969760191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556657145] [2021-07-09 18:07:36,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:36,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:07:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:36,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556657145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:36,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-07-09 18:07:36,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101027461] [2021-07-09 18:07:36,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:07:36,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:07:36,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:07:36,995 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:42,140 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-07-09 18:07:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:07:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:07:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:42,152 INFO L225 Difference]: With dead ends: 9269 [2021-07-09 18:07:42,152 INFO L226 Difference]: Without dead ends: 9265 [2021-07-09 18:07:42,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3201.4ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-07-09 18:07:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-07-09 18:07:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-07-09 18:07:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-07-09 18:07:42,280 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-07-09 18:07:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:42,280 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-07-09 18:07:42,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-07-09 18:07:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:07:42,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:42,286 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:42,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:42,502 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-07-09 18:07:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:42,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020454421] [2021-07-09 18:07:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020454421] [2021-07-09 18:07:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020454421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926447057] [2021-07-09 18:07:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:42,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 18:07:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:07:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:43,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926447057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:43,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:43,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-07-09 18:07:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275339275] [2021-07-09 18:07:43,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:07:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:07:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:07:43,542 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:52,948 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-07-09 18:07:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-07-09 18:07:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:07:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:52,969 INFO L225 Difference]: With dead ends: 14464 [2021-07-09 18:07:52,969 INFO L226 Difference]: Without dead ends: 14416 [2021-07-09 18:07:52,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 5547.6ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-07-09 18:07:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-07-09 18:07:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-07-09 18:07:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-07-09 18:07:53,157 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-07-09 18:07:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:53,157 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-07-09 18:07:53,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-07-09 18:07:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:07:53,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:53,163 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:53,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:53,377 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-07-09 18:07:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:53,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732412067] [2021-07-09 18:07:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:53,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:53,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732412067] [2021-07-09 18:07:53,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732412067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:53,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951839294] [2021-07-09 18:07:53,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:53,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:07:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:54,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951839294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:54,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:54,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-07-09 18:07:54,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807337619] [2021-07-09 18:07:54,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:07:54,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:07:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:07:54,349 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:01,786 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-07-09 18:08:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-07-09 18:08:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:01,810 INFO L225 Difference]: With dead ends: 17210 [2021-07-09 18:08:01,810 INFO L226 Difference]: Without dead ends: 17132 [2021-07-09 18:08:01,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 4996.5ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-07-09 18:08:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-07-09 18:08:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-07-09 18:08:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-07-09 18:08:01,986 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-07-09 18:08:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:01,987 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-07-09 18:08:01,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-07-09 18:08:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:01,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:01,992 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:02,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:02,208 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-07-09 18:08:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:02,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090320908] [2021-07-09 18:08:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:02,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:02,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090320908] [2021-07-09 18:08:02,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090320908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:02,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765431880] [2021-07-09 18:08:02,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:02,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-09 18:08:02,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:08:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765431880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:03,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:03,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-07-09 18:08:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434169400] [2021-07-09 18:08:03,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:08:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:08:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:08:03,314 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:11,755 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-07-09 18:08:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-07-09 18:08:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:11,786 INFO L225 Difference]: With dead ends: 19569 [2021-07-09 18:08:11,786 INFO L226 Difference]: Without dead ends: 19455 [2021-07-09 18:08:11,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 6111.0ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-07-09 18:08:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-07-09 18:08:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-07-09 18:08:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-07-09 18:08:11,937 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-07-09 18:08:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-07-09 18:08:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-07-09 18:08:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:11,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:11,942 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:12,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:12,157 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-07-09 18:08:12,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:12,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025378474] [2021-07-09 18:08:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:12,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025378474] [2021-07-09 18:08:12,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025378474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118888174] [2021-07-09 18:08:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:12,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-09 18:08:12,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:13,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118888174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:13,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:13,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-07-09 18:08:13,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499268771] [2021-07-09 18:08:13,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:08:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:08:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:08:13,197 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:19,899 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-07-09 18:08:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-09 18:08:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:19,935 INFO L225 Difference]: With dead ends: 22986 [2021-07-09 18:08:19,935 INFO L226 Difference]: Without dead ends: 22683 [2021-07-09 18:08:19,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 5070.6ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-07-09 18:08:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-07-09 18:08:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-07-09 18:08:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-07-09 18:08:20,096 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-07-09 18:08:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:20,096 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-07-09 18:08:20,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-07-09 18:08:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:20,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:20,101 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:20,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-07-09 18:08:20,317 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-07-09 18:08:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:20,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603767770] [2021-07-09 18:08:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:20,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:20,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603767770] [2021-07-09 18:08:20,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603767770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:20,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012721468] [2021-07-09 18:08:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:08:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012721468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-07-09 18:08:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283827793] [2021-07-09 18:08:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:08:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:08:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:08:21,340 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:26,202 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-07-09 18:08:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-07-09 18:08:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:26,236 INFO L225 Difference]: With dead ends: 22758 [2021-07-09 18:08:26,236 INFO L226 Difference]: Without dead ends: 22332 [2021-07-09 18:08:26,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 3876.6ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-07-09 18:08:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-07-09 18:08:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-07-09 18:08:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-07-09 18:08:26,401 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-07-09 18:08:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:26,402 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-07-09 18:08:26,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-07-09 18:08:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:26,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:26,406 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:26,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:26,622 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:26,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-07-09 18:08:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:26,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751696237] [2021-07-09 18:08:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:26,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:26,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751696237] [2021-07-09 18:08:26,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751696237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:26,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451436478] [2021-07-09 18:08:26,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:26,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:08:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451436478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:27,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:27,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-07-09 18:08:27,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474146482] [2021-07-09 18:08:27,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-09 18:08:27,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:27,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-09 18:08:27,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:08:27,709 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:33,526 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-07-09 18:08:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-07-09 18:08:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:33,560 INFO L225 Difference]: With dead ends: 22040 [2021-07-09 18:08:33,560 INFO L226 Difference]: Without dead ends: 21506 [2021-07-09 18:08:33,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 5015.4ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-07-09 18:08:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-07-09 18:08:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-07-09 18:08:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-07-09 18:08:33,729 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-07-09 18:08:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:33,730 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-07-09 18:08:33,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-07-09 18:08:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:33,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:33,734 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:33,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:33,937 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-07-09 18:08:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:33,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102435879] [2021-07-09 18:08:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:34,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102435879] [2021-07-09 18:08:34,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102435879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151978433] [2021-07-09 18:08:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:34,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 18:08:34,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:08:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151978433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:34,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:34,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-07-09 18:08:34,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890799147] [2021-07-09 18:08:34,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 18:08:34,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 18:08:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:08:34,996 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:41,224 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-07-09 18:08:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-07-09 18:08:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:41,249 INFO L225 Difference]: With dead ends: 19025 [2021-07-09 18:08:41,249 INFO L226 Difference]: Without dead ends: 18353 [2021-07-09 18:08:41,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 5337.8ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-07-09 18:08:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-07-09 18:08:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-07-09 18:08:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-07-09 18:08:41,379 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-07-09 18:08:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:41,379 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-07-09 18:08:41,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-07-09 18:08:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:41,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:41,384 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:41,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-09 18:08:41,600 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-07-09 18:08:41,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:41,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97260534] [2021-07-09 18:08:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:41,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:41,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97260534] [2021-07-09 18:08:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97260534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:41,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299702737] [2021-07-09 18:08:41,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:42,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:08:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299702737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:42,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:42,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-09 18:08:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553445202] [2021-07-09 18:08:42,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 18:08:42,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 18:08:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:08:42,745 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:48,827 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-07-09 18:08:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-07-09 18:08:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:48,850 INFO L225 Difference]: With dead ends: 17796 [2021-07-09 18:08:48,850 INFO L226 Difference]: Without dead ends: 16833 [2021-07-09 18:08:48,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 5418.3ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-07-09 18:08:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-07-09 18:08:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-07-09 18:08:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-07-09 18:08:48,973 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-07-09 18:08:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:48,973 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-07-09 18:08:48,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-07-09 18:08:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:08:48,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:48,978 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:49,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 18:08:49,194 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-07-09 18:08:49,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:49,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47975058] [2021-07-09 18:08:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47975058] [2021-07-09 18:08:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47975058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829131544] [2021-07-09 18:08:49,364 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:49,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 18:08:49,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:08:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:50,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829131544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:50,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:50,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-07-09 18:08:50,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235729762] [2021-07-09 18:08:50,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:08:50,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:08:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:08:50,112 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:59,620 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-07-09 18:08:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-07-09 18:08:59,620 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:08:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:59,637 INFO L225 Difference]: With dead ends: 12575 [2021-07-09 18:08:59,637 INFO L226 Difference]: Without dead ends: 12571 [2021-07-09 18:08:59,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8747.8ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-07-09 18:08:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-07-09 18:08:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-07-09 18:08:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-07-09 18:08:59,793 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-07-09 18:08:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:59,793 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-07-09 18:08:59,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-07-09 18:08:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 18:08:59,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:59,798 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:00,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:00,015 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-07-09 18:09:00,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:00,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205720270] [2021-07-09 18:09:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:00,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205720270] [2021-07-09 18:09:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205720270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785907237] [2021-07-09 18:09:00,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:00,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 18:09:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:09:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:01,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785907237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:01,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:01,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-07-09 18:09:01,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088649893] [2021-07-09 18:09:01,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-09 18:09:01,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-09 18:09:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:09:01,154 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:08,223 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-07-09 18:09:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-09 18:09:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-09 18:09:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:08,232 INFO L225 Difference]: With dead ends: 8440 [2021-07-09 18:09:08,232 INFO L226 Difference]: Without dead ends: 7990 [2021-07-09 18:09:08,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 6394.0ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-07-09 18:09:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-07-09 18:09:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-07-09 18:09:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-07-09 18:09:08,302 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-07-09 18:09:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:08,302 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-07-09 18:09:08,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-07-09 18:09:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 18:09:08,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:08,307 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:08,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:08,522 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-07-09 18:09:08,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:08,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132586346] [2021-07-09 18:09:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132586346] [2021-07-09 18:09:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132586346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002905868] [2021-07-09 18:09:08,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:09:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:09,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002905868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:09,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:09,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-07-09 18:09:09,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011003999] [2021-07-09 18:09:09,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:09,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:09,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:09,390 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:16,062 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-07-09 18:09:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-09 18:09:16,063 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-09 18:09:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:16,071 INFO L225 Difference]: With dead ends: 7544 [2021-07-09 18:09:16,071 INFO L226 Difference]: Without dead ends: 7540 [2021-07-09 18:09:16,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 6370.3ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-07-09 18:09:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-07-09 18:09:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-07-09 18:09:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-07-09 18:09:16,135 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-07-09 18:09:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:16,135 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-07-09 18:09:16,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-07-09 18:09:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 18:09:16,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:16,139 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:16,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-07-09 18:09:16,341 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-07-09 18:09:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:16,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486990511] [2021-07-09 18:09:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:16,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:16,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486990511] [2021-07-09 18:09:16,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486990511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:16,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889701308] [2021-07-09 18:09:16,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:16,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-09 18:09:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:17,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889701308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:17,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:17,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-07-09 18:09:17,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053574150] [2021-07-09 18:09:17,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:09:17,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:09:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:09:17,086 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:21,000 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-07-09 18:09:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:09:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-09 18:09:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:21,017 INFO L225 Difference]: With dead ends: 12090 [2021-07-09 18:09:21,017 INFO L226 Difference]: Without dead ends: 12081 [2021-07-09 18:09:21,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2838.0ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-07-09 18:09:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-07-09 18:09:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-07-09 18:09:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-07-09 18:09:21,128 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-07-09 18:09:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:21,128 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-07-09 18:09:21,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-07-09 18:09:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:09:21,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:21,135 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:21,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-09 18:09:21,349 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-07-09 18:09:21,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:21,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489582073] [2021-07-09 18:09:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:21,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:21,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489582073] [2021-07-09 18:09:21,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489582073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:21,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846096561] [2021-07-09 18:09:21,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:21,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 18:09:21,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:09:21,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846096561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:21,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:21,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-07-09 18:09:21,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256390115] [2021-07-09 18:09:21,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:09:21,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:09:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:09:21,708 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:21,991 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-07-09 18:09:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:09:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:09:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:22,003 INFO L225 Difference]: With dead ends: 9195 [2021-07-09 18:09:22,003 INFO L226 Difference]: Without dead ends: 9102 [2021-07-09 18:09:22,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:09:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-07-09 18:09:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-07-09 18:09:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-07-09 18:09:22,114 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-07-09 18:09:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:22,114 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-07-09 18:09:22,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-07-09 18:09:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:09:22,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:22,123 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:22,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:22,336 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-07-09 18:09:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:22,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294638074] [2021-07-09 18:09:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:22,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:22,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294638074] [2021-07-09 18:09:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294638074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:22,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482648500] [2021-07-09 18:09:22,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:22,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-09 18:09:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482648500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:23,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-07-09 18:09:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296294858] [2021-07-09 18:09:23,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:09:23,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:09:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:09:23,616 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:30,677 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-07-09 18:09:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-09 18:09:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:09:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:30,692 INFO L225 Difference]: With dead ends: 11486 [2021-07-09 18:09:30,692 INFO L226 Difference]: Without dead ends: 11482 [2021-07-09 18:09:30,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 4185.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-07-09 18:09:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-07-09 18:09:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-07-09 18:09:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-07-09 18:09:30,807 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-07-09 18:09:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:30,807 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-07-09 18:09:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-07-09 18:09:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:09:30,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:30,815 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:31,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:31,031 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-07-09 18:09:31,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:31,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867954258] [2021-07-09 18:09:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:31,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867954258] [2021-07-09 18:09:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867954258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390282826] [2021-07-09 18:09:31,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:31,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 18:09:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-09 18:09:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:32,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390282826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:32,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:32,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-07-09 18:09:32,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605550635] [2021-07-09 18:09:32,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:09:32,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:32,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:09:32,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:09:32,315 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:42,498 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-07-09 18:09:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-07-09 18:09:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:09:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:42,525 INFO L225 Difference]: With dead ends: 18453 [2021-07-09 18:09:42,525 INFO L226 Difference]: Without dead ends: 18405 [2021-07-09 18:09:42,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 6601.5ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-07-09 18:09:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-07-09 18:09:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-07-09 18:09:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-07-09 18:09:42,712 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-07-09 18:09:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:42,712 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-07-09 18:09:42,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-07-09 18:09:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:09:42,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:42,721 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:42,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 18:09:42,937 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-07-09 18:09:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117223632] [2021-07-09 18:09:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:43,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117223632] [2021-07-09 18:09:43,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117223632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637274309] [2021-07-09 18:09:43,206 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:43,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-09 18:09:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:09:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637274309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:44,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:44,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-07-09 18:09:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057183525] [2021-07-09 18:09:44,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:09:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:09:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:09:44,077 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:55,081 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-07-09 18:09:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-09 18:09:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:09:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:55,111 INFO L225 Difference]: With dead ends: 20814 [2021-07-09 18:09:55,111 INFO L226 Difference]: Without dead ends: 20736 [2021-07-09 18:09:55,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 7081.1ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-07-09 18:09:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-07-09 18:09:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-07-09 18:09:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-07-09 18:09:55,282 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-07-09 18:09:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:55,282 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-07-09 18:09:55,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-07-09 18:09:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:09:55,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:55,290 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:55,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:55,506 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:55,506 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-07-09 18:09:55,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:55,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884313497] [2021-07-09 18:09:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884313497] [2021-07-09 18:09:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884313497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463775045] [2021-07-09 18:09:55,780 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:09:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463775045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:56,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-07-09 18:09:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044321940] [2021-07-09 18:09:56,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-09 18:09:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-09 18:09:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:09:56,670 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:07,400 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-07-09 18:10:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-07-09 18:10:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:07,435 INFO L225 Difference]: With dead ends: 23395 [2021-07-09 18:10:07,435 INFO L226 Difference]: Without dead ends: 23281 [2021-07-09 18:10:07,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 7731.6ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-07-09 18:10:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-07-09 18:10:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-07-09 18:10:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-07-09 18:10:07,691 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-07-09 18:10:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:07,692 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-07-09 18:10:07,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-07-09 18:10:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:07,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:07,700 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:07,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-09 18:10:07,916 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:07,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-07-09 18:10:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:07,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418634345] [2021-07-09 18:10:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:08,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418634345] [2021-07-09 18:10:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418634345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692220529] [2021-07-09 18:10:08,196 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:08,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:10:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:08,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692220529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:08,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:08,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-07-09 18:10:08,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10952169] [2021-07-09 18:10:08,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-09 18:10:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-09 18:10:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:10:08,959 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:17,691 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-07-09 18:10:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-07-09 18:10:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:17,732 INFO L225 Difference]: With dead ends: 26465 [2021-07-09 18:10:17,732 INFO L226 Difference]: Without dead ends: 26309 [2021-07-09 18:10:17,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 6240.9ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-07-09 18:10:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-07-09 18:10:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-07-09 18:10:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-07-09 18:10:17,920 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-07-09 18:10:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:17,920 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-07-09 18:10:17,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-07-09 18:10:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:17,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:17,929 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:18,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:18,145 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:18,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-07-09 18:10:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:18,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251572881] [2021-07-09 18:10:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251572881] [2021-07-09 18:10:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251572881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594213877] [2021-07-09 18:10:18,425 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-09 18:10:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:10:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:19,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594213877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:19,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:19,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-07-09 18:10:19,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101507275] [2021-07-09 18:10:19,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 18:10:19,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 18:10:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:10:19,276 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:25,798 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-07-09 18:10:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-07-09 18:10:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:25,848 INFO L225 Difference]: With dead ends: 29047 [2021-07-09 18:10:25,848 INFO L226 Difference]: Without dead ends: 28687 [2021-07-09 18:10:25,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 5008.7ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-07-09 18:10:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-07-09 18:10:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-07-09 18:10:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-07-09 18:10:26,078 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-07-09 18:10:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:26,078 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-07-09 18:10:26,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-07-09 18:10:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:26,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:26,086 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-07-09 18:10:26,302 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-07-09 18:10:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713437344] [2021-07-09 18:10:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:26,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:26,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713437344] [2021-07-09 18:10:26,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713437344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:26,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034191295] [2021-07-09 18:10:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:26,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:26,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:10:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:27,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034191295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:27,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:27,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-07-09 18:10:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927032219] [2021-07-09 18:10:27,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-09 18:10:27,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-09 18:10:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:10:27,475 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:34,159 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-07-09 18:10:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-07-09 18:10:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:34,208 INFO L225 Difference]: With dead ends: 29747 [2021-07-09 18:10:34,208 INFO L226 Difference]: Without dead ends: 29174 [2021-07-09 18:10:34,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 5504.8ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-07-09 18:10:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-07-09 18:10:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-07-09 18:10:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-07-09 18:10:34,435 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-07-09 18:10:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:34,435 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-07-09 18:10:34,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-07-09 18:10:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:34,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:34,443 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:34,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:10:34,657 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-07-09 18:10:34,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:34,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212770224] [2021-07-09 18:10:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:34,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212770224] [2021-07-09 18:10:34,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212770224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50166187] [2021-07-09 18:10:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:35,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 18:10:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:10:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50166187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:35,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:35,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-07-09 18:10:35,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558548937] [2021-07-09 18:10:35,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:10:35,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:10:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:10:35,918 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:43,463 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-07-09 18:10:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-07-09 18:10:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:43,508 INFO L225 Difference]: With dead ends: 28419 [2021-07-09 18:10:43,508 INFO L226 Difference]: Without dead ends: 27744 [2021-07-09 18:10:43,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 6220.5ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-07-09 18:10:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-07-09 18:10:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-07-09 18:10:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-07-09 18:10:43,724 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-07-09 18:10:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:43,724 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-07-09 18:10:43,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-07-09 18:10:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:43,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:43,732 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:43,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:43,948 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:43,948 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-07-09 18:10:43,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:43,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397108732] [2021-07-09 18:10:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:44,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397108732] [2021-07-09 18:10:44,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397108732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534108586] [2021-07-09 18:10:44,268 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:44,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 18:10:44,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:10:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534108586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:45,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:45,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-07-09 18:10:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825530334] [2021-07-09 18:10:45,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:10:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:10:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:10:45,160 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:52,264 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-07-09 18:10:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-09 18:10:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:10:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:52,308 INFO L225 Difference]: With dead ends: 27835 [2021-07-09 18:10:52,308 INFO L226 Difference]: Without dead ends: 26926 [2021-07-09 18:10:52,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 6060.5ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-07-09 18:10:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-07-09 18:10:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-07-09 18:10:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-07-09 18:10:52,564 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-07-09 18:10:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:52,564 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-07-09 18:10:52,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-07-09 18:10:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:10:52,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:52,572 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:52,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:52,783 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:52,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-07-09 18:10:52,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:52,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217694935] [2021-07-09 18:10:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:53,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:53,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217694935] [2021-07-09 18:10:53,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217694935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:53,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380540600] [2021-07-09 18:10:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:10:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:54,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380540600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:54,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:54,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-07-09 18:10:54,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927931041] [2021-07-09 18:10:54,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-07-09 18:10:54,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-07-09 18:10:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:10:54,079 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:01,995 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-07-09 18:11:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-07-09 18:11:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:11:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:02,038 INFO L225 Difference]: With dead ends: 25077 [2021-07-09 18:11:02,038 INFO L226 Difference]: Without dead ends: 24000 [2021-07-09 18:11:02,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 7088.3ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-07-09 18:11:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-07-09 18:11:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-07-09 18:11:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-07-09 18:11:02,238 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-07-09 18:11:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:02,238 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-07-09 18:11:02,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-07-09 18:11:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:11:02,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:02,247 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:02,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-07-09 18:11:02,461 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-07-09 18:11:02,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:02,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492626118] [2021-07-09 18:11:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:02,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492626118] [2021-07-09 18:11:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492626118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685991426] [2021-07-09 18:11:02,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:02,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:11:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:03,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685991426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:03,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:03,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-07-09 18:11:03,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470425882] [2021-07-09 18:11:03,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:03,395 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:15,555 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-07-09 18:11:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-07-09 18:11:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:11:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:15,579 INFO L225 Difference]: With dead ends: 18047 [2021-07-09 18:11:15,579 INFO L226 Difference]: Without dead ends: 18043 [2021-07-09 18:11:15,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 11014.5ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-07-09 18:11:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-07-09 18:11:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-07-09 18:11:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-07-09 18:11:15,741 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-07-09 18:11:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:15,742 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-07-09 18:11:15,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-07-09 18:11:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 18:11:15,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:15,759 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:15,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:15,963 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-07-09 18:11:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314405170] [2021-07-09 18:11:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:16,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:16,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314405170] [2021-07-09 18:11:16,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314405170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:16,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263267403] [2021-07-09 18:11:16,250 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:16,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 18:11:16,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-09 18:11:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:17,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263267403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:17,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:17,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-07-09 18:11:17,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672544243] [2021-07-09 18:11:17,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:11:17,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:11:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:11:17,305 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:25,963 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-07-09 18:11:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-07-09 18:11:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 18:11:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:25,979 INFO L225 Difference]: With dead ends: 12913 [2021-07-09 18:11:25,979 INFO L226 Difference]: Without dead ends: 12355 [2021-07-09 18:11:25,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 7524.3ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-07-09 18:11:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-07-09 18:11:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-07-09 18:11:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-07-09 18:11:26,100 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-07-09 18:11:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:26,100 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-07-09 18:11:26,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-07-09 18:11:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 18:11:26,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:26,109 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:26,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:26,325 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-07-09 18:11:26,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:26,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806705623] [2021-07-09 18:11:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:26,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:26,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806705623] [2021-07-09 18:11:26,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806705623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:26,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487464440] [2021-07-09 18:11:26,478 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:26,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:11:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487464440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:27,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-07-09 18:11:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669734868] [2021-07-09 18:11:27,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:11:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:11:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:11:27,389 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:34,414 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-07-09 18:11:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-07-09 18:11:34,414 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 18:11:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:34,429 INFO L225 Difference]: With dead ends: 10949 [2021-07-09 18:11:34,429 INFO L226 Difference]: Without dead ends: 10945 [2021-07-09 18:11:34,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 6664.8ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-07-09 18:11:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-07-09 18:11:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-07-09 18:11:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-07-09 18:11:34,556 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-07-09 18:11:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:34,556 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-07-09 18:11:34,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-07-09 18:11:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:11:34,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:34,566 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:34,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-07-09 18:11:34,781 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-07-09 18:11:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:34,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142575497] [2021-07-09 18:11:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142575497] [2021-07-09 18:11:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142575497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020850943] [2021-07-09 18:11:34,912 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:34,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 18:11:34,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:11:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020850943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:35,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:35,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-09 18:11:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029647062] [2021-07-09 18:11:35,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:11:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:11:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:11:35,034 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:35,245 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-07-09 18:11:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:11:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:11:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:35,332 INFO L225 Difference]: With dead ends: 10902 [2021-07-09 18:11:35,333 INFO L226 Difference]: Without dead ends: 10809 [2021-07-09 18:11:35,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:11:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-07-09 18:11:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-07-09 18:11:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-07-09 18:11:35,461 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-07-09 18:11:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:35,461 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-07-09 18:11:35,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-07-09 18:11:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:11:35,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:35,471 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:35,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:35,681 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-07-09 18:11:35,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:35,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632043946] [2021-07-09 18:11:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:35,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632043946] [2021-07-09 18:11:35,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632043946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559376122] [2021-07-09 18:11:35,929 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:35,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 18:11:35,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-09 18:11:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:37,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559376122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:37,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:37,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-07-09 18:11:37,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625583617] [2021-07-09 18:11:37,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-09 18:11:37,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-09 18:11:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:11:37,014 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:46,332 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-07-09 18:11:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-09 18:11:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:11:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:46,358 INFO L225 Difference]: With dead ends: 19443 [2021-07-09 18:11:46,358 INFO L226 Difference]: Without dead ends: 19410 [2021-07-09 18:11:46,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5619.1ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-07-09 18:11:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-07-09 18:11:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-07-09 18:11:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-07-09 18:11:46,536 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-07-09 18:11:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:46,536 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-07-09 18:11:46,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-07-09 18:11:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:11:46,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:46,546 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:46,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:46,762 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-07-09 18:11:46,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:46,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287853795] [2021-07-09 18:11:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:47,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:47,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287853795] [2021-07-09 18:11:47,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287853795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:47,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074222277] [2021-07-09 18:11:47,022 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-09 18:11:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074222277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:48,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:48,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-07-09 18:11:48,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580477379] [2021-07-09 18:11:48,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:11:48,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:11:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:11:48,180 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:56,404 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-07-09 18:11:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-09 18:11:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:11:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:56,424 INFO L225 Difference]: With dead ends: 13973 [2021-07-09 18:11:56,424 INFO L226 Difference]: Without dead ends: 13969 [2021-07-09 18:11:56,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4750.7ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-07-09 18:11:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-07-09 18:11:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-07-09 18:11:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-07-09 18:11:56,581 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-07-09 18:11:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:56,581 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-07-09 18:11:56,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-07-09 18:11:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:11:56,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:56,592 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:56,798 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-07-09 18:11:56,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:56,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519619522] [2021-07-09 18:11:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:57,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:57,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519619522] [2021-07-09 18:11:57,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519619522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:57,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707127112] [2021-07-09 18:11:57,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:57,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:57,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:57,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707127112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:58,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:58,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-07-09 18:11:58,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761322792] [2021-07-09 18:11:58,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-09 18:11:58,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-09 18:11:58,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:11:58,070 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:09,176 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-07-09 18:12:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-07-09 18:12:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:12:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:09,279 INFO L225 Difference]: With dead ends: 22051 [2021-07-09 18:12:09,279 INFO L226 Difference]: Without dead ends: 22003 [2021-07-09 18:12:09,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 7138.7ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-07-09 18:12:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-07-09 18:12:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-07-09 18:12:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-07-09 18:12:09,475 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-07-09 18:12:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-07-09 18:12:09,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-07-09 18:12:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:12:09,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:09,486 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:09,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:09,701 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-07-09 18:12:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:09,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973246514] [2021-07-09 18:12:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:09,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973246514] [2021-07-09 18:12:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973246514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748444408] [2021-07-09 18:12:09,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:10,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-09 18:12:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748444408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:11,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-07-09 18:12:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366493883] [2021-07-09 18:12:11,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 18:12:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 18:12:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:12:11,043 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,626 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-07-09 18:12:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-09 18:12:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:12:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,667 INFO L225 Difference]: With dead ends: 25316 [2021-07-09 18:12:23,667 INFO L226 Difference]: Without dead ends: 25238 [2021-07-09 18:12:23,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 8745.2ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-07-09 18:12:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-07-09 18:12:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-07-09 18:12:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-07-09 18:12:23,891 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-07-09 18:12:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,891 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-07-09 18:12:23,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-07-09 18:12:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:12:23,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,901 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:24,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-09 18:12:24,117 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-07-09 18:12:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:24,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580558657] [2021-07-09 18:12:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580558657] [2021-07-09 18:12:24,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580558657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565661408] [2021-07-09 18:12:24,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-09 18:12:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565661408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:25,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-07-09 18:12:25,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51964043] [2021-07-09 18:12:25,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-09 18:12:25,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:25,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-09 18:12:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:12:25,468 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:38,203 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-07-09 18:12:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-07-09 18:12:38,203 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:12:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:38,257 INFO L225 Difference]: With dead ends: 28045 [2021-07-09 18:12:38,257 INFO L226 Difference]: Without dead ends: 27931 [2021-07-09 18:12:38,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8802.7ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-07-09 18:12:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-07-09 18:12:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-07-09 18:12:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-07-09 18:12:38,493 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-07-09 18:12:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:38,493 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-07-09 18:12:38,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-07-09 18:12:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:12:38,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:38,503 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:38,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:38,719 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:38,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-07-09 18:12:38,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:38,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792796785] [2021-07-09 18:12:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:39,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792796785] [2021-07-09 18:12:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792796785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876662226] [2021-07-09 18:12:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:39,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-09 18:12:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-09 18:12:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876662226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:39,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:39,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-07-09 18:12:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833467411] [2021-07-09 18:12:39,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:12:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:12:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:12:39,941 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:52,077 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-07-09 18:12:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-07-09 18:12:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:12:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:52,131 INFO L225 Difference]: With dead ends: 31079 [2021-07-09 18:12:52,131 INFO L226 Difference]: Without dead ends: 30923 [2021-07-09 18:12:52,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 8443.9ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-07-09 18:12:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-07-09 18:12:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-07-09 18:12:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-07-09 18:12:52,390 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-07-09 18:12:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:52,391 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-07-09 18:12:52,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-07-09 18:12:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:12:52,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:52,401 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:52,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-07-09 18:12:52,619 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-07-09 18:12:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:52,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710580762] [2021-07-09 18:12:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:52,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:52,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710580762] [2021-07-09 18:12:52,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710580762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:52,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194906997] [2021-07-09 18:12:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:52,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-09 18:12:52,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:12:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194906997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:53,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:53,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-07-09 18:12:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632097025] [2021-07-09 18:12:53,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:12:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:12:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:12:53,968 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:03,668 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-07-09 18:13:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-07-09 18:13:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:03,723 INFO L225 Difference]: With dead ends: 35057 [2021-07-09 18:13:03,723 INFO L226 Difference]: Without dead ends: 34541 [2021-07-09 18:13:03,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 7194.7ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-07-09 18:13:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-07-09 18:13:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-07-09 18:13:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-07-09 18:13:03,987 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-07-09 18:13:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-07-09 18:13:03,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-07-09 18:13:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:03,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:03,997 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:04,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-07-09 18:13:04,203 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-07-09 18:13:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:04,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794707291] [2021-07-09 18:13:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:04,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794707291] [2021-07-09 18:13:04,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794707291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807842215] [2021-07-09 18:13:04,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:13:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:05,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807842215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:05,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:05,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-07-09 18:13:05,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353604229] [2021-07-09 18:13:05,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-09 18:13:05,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-09 18:13:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:13:05,430 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:12,602 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-07-09 18:13:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-07-09 18:13:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:12,662 INFO L225 Difference]: With dead ends: 37059 [2021-07-09 18:13:12,663 INFO L226 Difference]: Without dead ends: 36519 [2021-07-09 18:13:12,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5786.8ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-07-09 18:13:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-07-09 18:13:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-07-09 18:13:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-07-09 18:13:12,960 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-07-09 18:13:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:12,960 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-07-09 18:13:12,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-07-09 18:13:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:12,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:12,970 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:13,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-09 18:13:13,185 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-07-09 18:13:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:13,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929106910] [2021-07-09 18:13:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:13,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:13,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929106910] [2021-07-09 18:13:13,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929106910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:13,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199037191] [2021-07-09 18:13:13,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:13,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:13,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:13:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:14,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199037191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:14,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:14,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-07-09 18:13:14,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720447752] [2021-07-09 18:13:14,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:13:14,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:13:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:13:14,418 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:22,736 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-07-09 18:13:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-07-09 18:13:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:22,793 INFO L225 Difference]: With dead ends: 36366 [2021-07-09 18:13:22,794 INFO L226 Difference]: Without dead ends: 35634 [2021-07-09 18:13:22,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6732.2ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-07-09 18:13:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-07-09 18:13:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-07-09 18:13:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-07-09 18:13:23,161 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-07-09 18:13:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:23,161 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-07-09 18:13:23,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-07-09 18:13:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:23,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:23,170 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:23,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:23,385 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-07-09 18:13:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:23,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315313211] [2021-07-09 18:13:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:23,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:23,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315313211] [2021-07-09 18:13:23,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315313211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:23,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005799927] [2021-07-09 18:13:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:23,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 18:13:23,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:13:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005799927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:24,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-07-09 18:13:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067590787] [2021-07-09 18:13:24,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:13:24,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:24,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:13:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:13:24,660 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:32,969 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-07-09 18:13:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-07-09 18:13:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:33,023 INFO L225 Difference]: With dead ends: 35312 [2021-07-09 18:13:33,024 INFO L226 Difference]: Without dead ends: 34400 [2021-07-09 18:13:33,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6886.6ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-07-09 18:13:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-07-09 18:13:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-07-09 18:13:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-07-09 18:13:33,294 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-07-09 18:13:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:33,294 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-07-09 18:13:33,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-07-09 18:13:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:33,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:33,304 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:33,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-09 18:13:33,520 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-07-09 18:13:33,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:33,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121061721] [2021-07-09 18:13:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:33,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121061721] [2021-07-09 18:13:33,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121061721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747366301] [2021-07-09 18:13:33,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:33,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:13:33,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:34,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747366301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:34,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:34,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-07-09 18:13:34,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006062190] [2021-07-09 18:13:34,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-07-09 18:13:34,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-07-09 18:13:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:13:34,865 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:43,393 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-07-09 18:13:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-07-09 18:13:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:43,449 INFO L225 Difference]: With dead ends: 33658 [2021-07-09 18:13:43,449 INFO L226 Difference]: Without dead ends: 32578 [2021-07-09 18:13:43,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 7323.4ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-07-09 18:13:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-07-09 18:13:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-07-09 18:13:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-07-09 18:13:43,787 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-07-09 18:13:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:43,787 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-07-09 18:13:43,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-07-09 18:13:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:43,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:43,796 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:44,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:44,012 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:44,012 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-07-09 18:13:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:44,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204739765] [2021-07-09 18:13:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204739765] [2021-07-09 18:13:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204739765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190783815] [2021-07-09 18:13:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:44,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 18:13:44,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:13:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:45,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190783815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:45,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:45,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-07-09 18:13:45,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467408374] [2021-07-09 18:13:45,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-09 18:13:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-09 18:13:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:13:45,348 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:54,267 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-07-09 18:13:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-07-09 18:13:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:13:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:54,311 INFO L225 Difference]: With dead ends: 29282 [2021-07-09 18:13:54,311 INFO L226 Difference]: Without dead ends: 28076 [2021-07-09 18:13:54,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 7712.8ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-07-09 18:13:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-07-09 18:13:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-07-09 18:13:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-07-09 18:13:54,536 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-07-09 18:13:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:54,536 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-07-09 18:13:54,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-07-09 18:13:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:13:54,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:54,546 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:54,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:54,761 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-07-09 18:13:54,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:54,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738318088] [2021-07-09 18:13:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:54,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738318088] [2021-07-09 18:13:54,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738318088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268378275] [2021-07-09 18:13:54,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:55,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 18:13:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:13:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268378275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:55,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:55,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-07-09 18:13:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246901298] [2021-07-09 18:13:55,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:13:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:13:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:13:55,868 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:10,132 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-07-09 18:14:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-07-09 18:14:10,132 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:14:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:10,159 INFO L225 Difference]: With dead ends: 20078 [2021-07-09 18:14:10,159 INFO L226 Difference]: Without dead ends: 20074 [2021-07-09 18:14:10,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 12812.3ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-07-09 18:14:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-07-09 18:14:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-07-09 18:14:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-07-09 18:14:10,348 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-07-09 18:14:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:10,348 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-07-09 18:14:10,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-07-09 18:14:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 18:14:10,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:10,358 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:10,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-07-09 18:14:10,573 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-07-09 18:14:10,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:10,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044930501] [2021-07-09 18:14:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:11,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044930501] [2021-07-09 18:14:11,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044930501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327376000] [2021-07-09 18:14:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:14:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327376000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:12,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:12,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-07-09 18:14:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183668471] [2021-07-09 18:14:12,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-07-09 18:14:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-07-09 18:14:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:14:12,068 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:22,736 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-07-09 18:14:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-07-09 18:14:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-09 18:14:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:22,755 INFO L225 Difference]: With dead ends: 14048 [2021-07-09 18:14:22,755 INFO L226 Difference]: Without dead ends: 13436 [2021-07-09 18:14:22,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 9341.7ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-07-09 18:14:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-07-09 18:14:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-07-09 18:14:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-07-09 18:14:22,903 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-07-09 18:14:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:22,903 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-07-09 18:14:22,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-07-09 18:14:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 18:14:22,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:22,913 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:23,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:23,129 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-07-09 18:14:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:23,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436048169] [2021-07-09 18:14:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:23,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:23,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436048169] [2021-07-09 18:14:23,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436048169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:23,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527362948] [2021-07-09 18:14:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:23,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:23,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:23,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:14:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:24,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527362948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:24,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:24,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-07-09 18:14:24,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142128896] [2021-07-09 18:14:24,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-09 18:14:24,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-09 18:14:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:14:24,224 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:33,834 INFO L93 Difference]: Finished difference Result 12908 states and 29868 transitions. [2021-07-09 18:14:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-07-09 18:14:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-09 18:14:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:33,850 INFO L225 Difference]: With dead ends: 12908 [2021-07-09 18:14:33,850 INFO L226 Difference]: Without dead ends: 12904 [2021-07-09 18:14:33,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40550 ImplicationChecksByTransitivity, 8950.1ms TimeCoverageRelationStatistics Valid=21246, Invalid=69656, Unknown=0, NotChecked=0, Total=90902 [2021-07-09 18:14:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2021-07-09 18:14:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 10532. [2021-07-09 18:14:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.390941031241098) internal successors, (25179), 10531 states have internal predecessors, (25179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25179 transitions. [2021-07-09 18:14:33,989 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25179 transitions. Word has length 69 [2021-07-09 18:14:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:33,989 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25179 transitions. [2021-07-09 18:14:33,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25179 transitions. [2021-07-09 18:14:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 18:14:33,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:33,999 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:34,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:34,215 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1564076785, now seen corresponding path program 135 times [2021-07-09 18:14:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574809124] [2021-07-09 18:14:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:34,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574809124] [2021-07-09 18:14:34,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574809124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32382094] [2021-07-09 18:14:34,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:34,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-09 18:14:34,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:14:34,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32382094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:35,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-09 18:14:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539571123] [2021-07-09 18:14:35,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:14:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:14:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:14:35,444 INFO L87 Difference]: Start difference. First operand 10532 states and 25179 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:43,809 INFO L93 Difference]: Finished difference Result 24107 states and 54772 transitions. [2021-07-09 18:14:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-07-09 18:14:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-09 18:14:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:43,844 INFO L225 Difference]: With dead ends: 24107 [2021-07-09 18:14:43,845 INFO L226 Difference]: Without dead ends: 24107 [2021-07-09 18:14:43,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21229 ImplicationChecksByTransitivity, 7653.2ms TimeCoverageRelationStatistics Valid=13586, Invalid=43296, Unknown=0, NotChecked=0, Total=56882 [2021-07-09 18:14:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-07-09 18:14:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 16231. [2021-07-09 18:14:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16231 states, 16230 states have (on average 2.4091189155884165) internal successors, (39100), 16230 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16231 states to 16231 states and 39100 transitions. [2021-07-09 18:14:44,116 INFO L78 Accepts]: Start accepts. Automaton has 16231 states and 39100 transitions. Word has length 69 [2021-07-09 18:14:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:44,116 INFO L482 AbstractCegarLoop]: Abstraction has 16231 states and 39100 transitions. [2021-07-09 18:14:44,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16231 states and 39100 transitions. [2021-07-09 18:14:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:14:44,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:44,134 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:44,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-07-09 18:14:44,350 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -543763977, now seen corresponding path program 136 times [2021-07-09 18:14:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:44,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892307118] [2021-07-09 18:14:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 1 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:44,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:44,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892307118] [2021-07-09 18:14:44,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892307118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:44,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950188517] [2021-07-09 18:14:44,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:44,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:14:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:44,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950188517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:44,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:44,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-09 18:14:44,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472182260] [2021-07-09 18:14:44,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:14:44,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:14:44,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:14:44,661 INFO L87 Difference]: Start difference. First operand 16231 states and 39100 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:44,973 INFO L93 Difference]: Finished difference Result 19318 states and 46494 transitions. [2021-07-09 18:14:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:14:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:14:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:45,007 INFO L225 Difference]: With dead ends: 19318 [2021-07-09 18:14:45,007 INFO L226 Difference]: Without dead ends: 19219 [2021-07-09 18:14:45,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:14:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-07-09 18:14:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 18332. [2021-07-09 18:14:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18332 states, 18331 states have (on average 2.4355463422617425) internal successors, (44646), 18331 states have internal predecessors, (44646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18332 states to 18332 states and 44646 transitions. [2021-07-09 18:14:45,286 INFO L78 Accepts]: Start accepts. Automaton has 18332 states and 44646 transitions. Word has length 71 [2021-07-09 18:14:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:45,286 INFO L482 AbstractCegarLoop]: Abstraction has 18332 states and 44646 transitions. [2021-07-09 18:14:45,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18332 states and 44646 transitions. [2021-07-09 18:14:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:14:45,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:45,305 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:45,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-07-09 18:14:45,521 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1240447561, now seen corresponding path program 137 times [2021-07-09 18:14:45,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:45,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222706720] [2021-07-09 18:14:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:46,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:46,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222706720] [2021-07-09 18:14:46,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222706720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:46,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140077229] [2021-07-09 18:14:46,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:46,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 18:14:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:46,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-07-09 18:14:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140077229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:47,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:47,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-09 18:14:47,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150689821] [2021-07-09 18:14:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-09 18:14:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-09 18:14:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:14:47,501 INFO L87 Difference]: Start difference. First operand 18332 states and 44646 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:56,158 INFO L93 Difference]: Finished difference Result 22788 states and 54409 transitions. [2021-07-09 18:14:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:14:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:14:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:56,193 INFO L225 Difference]: With dead ends: 22788 [2021-07-09 18:14:56,193 INFO L226 Difference]: Without dead ends: 22782 [2021-07-09 18:14:56,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 5570.1ms TimeCoverageRelationStatistics Valid=1710, Invalid=29796, Unknown=0, NotChecked=0, Total=31506 [2021-07-09 18:14:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2021-07-09 18:14:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 18201. [2021-07-09 18:14:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18201 states, 18200 states have (on average 2.431263736263736) internal successors, (44249), 18200 states have internal predecessors, (44249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18201 states to 18201 states and 44249 transitions. [2021-07-09 18:14:56,503 INFO L78 Accepts]: Start accepts. Automaton has 18201 states and 44249 transitions. Word has length 71 [2021-07-09 18:14:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:56,503 INFO L482 AbstractCegarLoop]: Abstraction has 18201 states and 44249 transitions. [2021-07-09 18:14:56,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18201 states and 44249 transitions. [2021-07-09 18:14:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:14:56,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:56,523 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:56,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-09 18:14:56,737 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -761922611, now seen corresponding path program 138 times [2021-07-09 18:14:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175158588] [2021-07-09 18:14:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:57,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175158588] [2021-07-09 18:14:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175158588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403412480] [2021-07-09 18:14:57,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:57,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-09 18:14:57,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-09 18:14:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:58,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403412480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:58,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:58,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 54 [2021-07-09 18:14:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677468073] [2021-07-09 18:14:58,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-09 18:14:58,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-09 18:14:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:14:58,271 INFO L87 Difference]: Start difference. First operand 18201 states and 44249 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:10,045 INFO L93 Difference]: Finished difference Result 32295 states and 74537 transitions. [2021-07-09 18:15:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-07-09 18:15:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:15:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:10,101 INFO L225 Difference]: With dead ends: 32295 [2021-07-09 18:15:10,101 INFO L226 Difference]: Without dead ends: 32271 [2021-07-09 18:15:10,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 6355.3ms TimeCoverageRelationStatistics Valid=3190, Invalid=46762, Unknown=0, NotChecked=0, Total=49952 [2021-07-09 18:15:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-07-09 18:15:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 18835. [2021-07-09 18:15:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 18834 states have (on average 2.43320590421578) internal successors, (45827), 18834 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 45827 transitions. [2021-07-09 18:15:10,489 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 45827 transitions. Word has length 71 [2021-07-09 18:15:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 18835 states and 45827 transitions. [2021-07-09 18:15:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 45827 transitions. [2021-07-09 18:15:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:15:10,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:10,511 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:10,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:10,728 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:10,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1492288521, now seen corresponding path program 139 times [2021-07-09 18:15:10,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:10,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612405195] [2021-07-09 18:15:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:11,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612405195] [2021-07-09 18:15:11,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612405195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559697286] [2021-07-09 18:15:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-09 18:15:11,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:12,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559697286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:12,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:12,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2021-07-09 18:15:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592821945] [2021-07-09 18:15:12,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 18:15:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 18:15:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2613, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:15:12,331 INFO L87 Difference]: Start difference. First operand 18835 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:21,366 INFO L93 Difference]: Finished difference Result 22962 states and 54390 transitions. [2021-07-09 18:15:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-09 18:15:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:15:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:21,408 INFO L225 Difference]: With dead ends: 22962 [2021-07-09 18:15:21,408 INFO L226 Difference]: Without dead ends: 22958 [2021-07-09 18:15:21,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10162 ImplicationChecksByTransitivity, 5257.4ms TimeCoverageRelationStatistics Valid=2219, Invalid=30361, Unknown=0, NotChecked=0, Total=32580 [2021-07-09 18:15:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2021-07-09 18:15:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 18355. [2021-07-09 18:15:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.4328756674294434) internal successors, (44653), 18354 states have internal predecessors, (44653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 44653 transitions. [2021-07-09 18:15:21,738 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 44653 transitions. Word has length 71 [2021-07-09 18:15:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:21,738 INFO L482 AbstractCegarLoop]: Abstraction has 18355 states and 44653 transitions. [2021-07-09 18:15:21,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 44653 transitions. [2021-07-09 18:15:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:15:21,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:21,757 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:21,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-09 18:15:21,973 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -350033327, now seen corresponding path program 140 times [2021-07-09 18:15:21,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:21,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623616282] [2021-07-09 18:15:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:22,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623616282] [2021-07-09 18:15:22,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623616282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080031919] [2021-07-09 18:15:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:22,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-09 18:15:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:23,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080031919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:23,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:23,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33] total 55 [2021-07-09 18:15:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934468219] [2021-07-09 18:15:23,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-09 18:15:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-09 18:15:23,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:15:23,465 INFO L87 Difference]: Start difference. First operand 18355 states and 44653 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:38,165 INFO L93 Difference]: Finished difference Result 37702 states and 86336 transitions. [2021-07-09 18:15:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-07-09 18:15:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:15:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:38,233 INFO L225 Difference]: With dead ends: 37702 [2021-07-09 18:15:38,233 INFO L226 Difference]: Without dead ends: 37654 [2021-07-09 18:15:38,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30992 ImplicationChecksByTransitivity, 8274.1ms TimeCoverageRelationStatistics Valid=5971, Invalid=77261, Unknown=0, NotChecked=0, Total=83232 [2021-07-09 18:15:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37654 states. [2021-07-09 18:15:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37654 to 18337. [2021-07-09 18:15:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 2.4334096858638743) internal successors, (44619), 18336 states have internal predecessors, (44619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 44619 transitions. [2021-07-09 18:15:38,635 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 44619 transitions. Word has length 71 [2021-07-09 18:15:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:38,635 INFO L482 AbstractCegarLoop]: Abstraction has 18337 states and 44619 transitions. [2021-07-09 18:15:38,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 44619 transitions. [2021-07-09 18:15:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:15:38,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:38,656 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:38,869 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2012235221, now seen corresponding path program 141 times [2021-07-09 18:15:38,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:38,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945188685] [2021-07-09 18:15:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:39,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:39,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945188685] [2021-07-09 18:15:39,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945188685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:39,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023092326] [2021-07-09 18:15:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:39,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 18:15:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-07-09 18:15:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:40,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023092326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:40,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:40,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-07-09 18:15:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109718339] [2021-07-09 18:15:40,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:15:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:15:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:15:40,559 INFO L87 Difference]: Start difference. First operand 18337 states and 44619 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:56,803 INFO L93 Difference]: Finished difference Result 40824 states and 93013 transitions. [2021-07-09 18:15:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-07-09 18:15:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:15:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:56,870 INFO L225 Difference]: With dead ends: 40824 [2021-07-09 18:15:56,871 INFO L226 Difference]: Without dead ends: 40746 [2021-07-09 18:15:56,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43904 ImplicationChecksByTransitivity, 10450.1ms TimeCoverageRelationStatistics Valid=8886, Invalid=104346, Unknown=0, NotChecked=0, Total=113232 [2021-07-09 18:15:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40746 states. [2021-07-09 18:15:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40746 to 18395. [2021-07-09 18:15:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18395 states, 18394 states have (on average 2.434326410786126) internal successors, (44777), 18394 states have internal predecessors, (44777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 44777 transitions. [2021-07-09 18:15:57,288 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 44777 transitions. Word has length 71 [2021-07-09 18:15:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:57,288 INFO L482 AbstractCegarLoop]: Abstraction has 18395 states and 44777 transitions. [2021-07-09 18:15:57,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 44777 transitions. [2021-07-09 18:15:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:15:57,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:57,308 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:57,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-09 18:15:57,524 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1654141351, now seen corresponding path program 142 times [2021-07-09 18:15:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:57,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642011951] [2021-07-09 18:15:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:57,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:57,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642011951] [2021-07-09 18:15:57,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642011951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:57,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469886557] [2021-07-09 18:15:57,930 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:57,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:57,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-09 18:15:57,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469886557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:59,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:59,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 57 [2021-07-09 18:15:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045701678] [2021-07-09 18:15:59,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-09 18:15:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-09 18:15:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2997, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:15:59,064 INFO L87 Difference]: Start difference. First operand 18395 states and 44777 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:15,612 INFO L93 Difference]: Finished difference Result 45054 states and 102607 transitions. [2021-07-09 18:16:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-07-09 18:16:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:16:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:15,690 INFO L225 Difference]: With dead ends: 45054 [2021-07-09 18:16:15,690 INFO L226 Difference]: Without dead ends: 44940 [2021-07-09 18:16:15,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52320 ImplicationChecksByTransitivity, 10777.5ms TimeCoverageRelationStatistics Valid=11585, Invalid=120547, Unknown=0, NotChecked=0, Total=132132 [2021-07-09 18:16:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44940 states. [2021-07-09 18:16:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44940 to 18331. [2021-07-09 18:16:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18331 states, 18330 states have (on average 2.4338788870703763) internal successors, (44613), 18330 states have internal predecessors, (44613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18331 states to 18331 states and 44613 transitions. [2021-07-09 18:16:16,153 INFO L78 Accepts]: Start accepts. Automaton has 18331 states and 44613 transitions. Word has length 71 [2021-07-09 18:16:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:16,153 INFO L482 AbstractCegarLoop]: Abstraction has 18331 states and 44613 transitions. [2021-07-09 18:16:16,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18331 states and 44613 transitions. [2021-07-09 18:16:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:16:16,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:16,172 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:16,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-09 18:16:16,388 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1006846941, now seen corresponding path program 143 times [2021-07-09 18:16:16,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:16,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802656630] [2021-07-09 18:16:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:16,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802656630] [2021-07-09 18:16:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802656630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971100459] [2021-07-09 18:16:16,749 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:16,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-09 18:16:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-07-09 18:16:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971100459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:17,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:17,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34] total 59 [2021-07-09 18:16:17,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900189392] [2021-07-09 18:16:17,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:16:17,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:16:17,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:16:17,770 INFO L87 Difference]: Start difference. First operand 18331 states and 44613 transitions. Second operand has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:18,957 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:16:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:33,662 INFO L93 Difference]: Finished difference Result 48876 states and 111241 transitions. [2021-07-09 18:16:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2021-07-09 18:16:33,662 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:16:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:33,743 INFO L225 Difference]: With dead ends: 48876 [2021-07-09 18:16:33,743 INFO L226 Difference]: Without dead ends: 48720 [2021-07-09 18:16:33,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53257 ImplicationChecksByTransitivity, 10629.8ms TimeCoverageRelationStatistics Valid=13404, Invalid=118728, Unknown=0, NotChecked=0, Total=132132 [2021-07-09 18:16:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48720 states. [2021-07-09 18:16:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48720 to 18177. [2021-07-09 18:16:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18177 states, 18176 states have (on average 2.4345840669014085) internal successors, (44251), 18176 states have internal predecessors, (44251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18177 states to 18177 states and 44251 transitions. [2021-07-09 18:16:34,173 INFO L78 Accepts]: Start accepts. Automaton has 18177 states and 44251 transitions. Word has length 71 [2021-07-09 18:16:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:34,174 INFO L482 AbstractCegarLoop]: Abstraction has 18177 states and 44251 transitions. [2021-07-09 18:16:34,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 18177 states and 44251 transitions. [2021-07-09 18:16:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:16:34,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:34,192 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:34,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:34,397 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1816946273, now seen corresponding path program 144 times [2021-07-09 18:16:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:34,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454565177] [2021-07-09 18:16:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 30 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:34,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454565177] [2021-07-09 18:16:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454565177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016843576] [2021-07-09 18:16:34,669 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:34,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-09 18:16:34,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 69 conjunts are in the unsatisfiable core [2021-07-09 18:16:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 30 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:35,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016843576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:35,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:35,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33] total 59 [2021-07-09 18:16:35,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487872924] [2021-07-09 18:16:35,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:16:35,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:16:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3181, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:16:35,766 INFO L87 Difference]: Start difference. First operand 18177 states and 44251 transitions. Second operand has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,194 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-07-09 18:16:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:48,556 INFO L93 Difference]: Finished difference Result 54069 states and 122888 transitions. [2021-07-09 18:16:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-07-09 18:16:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:16:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:48,668 INFO L225 Difference]: With dead ends: 54069 [2021-07-09 18:16:48,668 INFO L226 Difference]: Without dead ends: 53865 [2021-07-09 18:16:48,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43354 ImplicationChecksByTransitivity, 9079.6ms TimeCoverageRelationStatistics Valid=12854, Invalid=96376, Unknown=0, NotChecked=0, Total=109230 [2021-07-09 18:16:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53865 states. [2021-07-09 18:16:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53865 to 18083. [2021-07-09 18:16:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18083 states, 18082 states have (on average 2.4368432695498288) internal successors, (44063), 18082 states have internal predecessors, (44063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18083 states to 18083 states and 44063 transitions. [2021-07-09 18:16:49,162 INFO L78 Accepts]: Start accepts. Automaton has 18083 states and 44063 transitions. Word has length 71 [2021-07-09 18:16:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:49,162 INFO L482 AbstractCegarLoop]: Abstraction has 18083 states and 44063 transitions. [2021-07-09 18:16:49,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18083 states and 44063 transitions. [2021-07-09 18:16:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:16:49,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:49,182 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:49,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable806 [2021-07-09 18:16:49,387 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash -86182427, now seen corresponding path program 145 times [2021-07-09 18:16:49,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:49,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40868915] [2021-07-09 18:16:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:49,572 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:16:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 42 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:49,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40868915] [2021-07-09 18:16:49,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40868915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99196131] [2021-07-09 18:16:49,863 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:16:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 42 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99196131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:50,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:50,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33] total 60 [2021-07-09 18:16:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95353016] [2021-07-09 18:16:50,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-07-09 18:16:50,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-07-09 18:16:50,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=3273, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:16:50,877 INFO L87 Difference]: Start difference. First operand 18083 states and 44063 transitions. Second operand has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:16:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:16:54,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-07-09 18:16:54,897 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:16:54,900 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:16:54,901 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:16:54,901 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:16:54 BasicIcfg [2021-07-09 18:16:54,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:16:54,902 INFO L168 Benchmark]: Toolchain (without parser) took 885343.56 ms. Allocated memory was 174.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 153.0 MB in the beginning and 601.6 MB in the end (delta: -448.6 MB). Peak memory consumption was 944.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 174.1 MB. Free memory was 154.2 MB in the beginning and 154.0 MB in the end (delta: 181.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.19 ms. Allocated memory is still 174.1 MB. Free memory was 153.0 MB in the beginning and 151.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 INFO L168 Benchmark]: Boogie Preprocessor took 13.25 ms. Allocated memory is still 174.1 MB. Free memory was 151.5 MB in the beginning and 150.6 MB in the end (delta: 833.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 INFO L168 Benchmark]: RCFGBuilder took 213.03 ms. Allocated memory is still 174.1 MB. Free memory was 150.5 MB in the beginning and 139.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 INFO L168 Benchmark]: TraceAbstraction took 885091.52 ms. Allocated memory was 174.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 139.2 MB in the beginning and 601.6 MB in the end (delta: -462.5 MB). Peak memory consumption was 931.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:54,902 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 0.11 ms. Allocated memory is still 174.1 MB. Free memory was 154.2 MB in the beginning and 154.0 MB in the end (delta: 181.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.19 ms. Allocated memory is still 174.1 MB. Free memory was 153.0 MB in the beginning and 151.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.25 ms. Allocated memory is still 174.1 MB. Free memory was 151.5 MB in the beginning and 150.6 MB in the end (delta: 833.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 213.03 ms. Allocated memory is still 174.1 MB. Free memory was 150.5 MB in the beginning and 139.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 885091.52 ms. Allocated memory was 174.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 139.2 MB in the beginning and 601.6 MB in the end (delta: -462.5 MB). Peak memory consumption was 931.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (18083states) and FLOYD_HOARE automaton (currently 87 states, 61 states before enhancement),while ReachableStatesComputation was computing reachable states (1061 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 885034.4ms, OverallIterations: 147, TraceHistogramMax: 14, EmptinessCheckTime: 840.0ms, AutomataDifference: 720558.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9533 SDtfs, 76200 SDslu, 172343 SDs, 0 SdLazy, 519002 SolverSat, 24255 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 177881.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28037 GetRequests, 5039 SyntacticMatches, 96 SemanticMatches, 22902 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978920 ImplicationChecksByTransitivity, 552975.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18835occurred in iteration=140, InterpolantAutomatonStates: 18239, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16597.9ms AutomataMinimizationTime, 146 MinimizatonAttempts, 996969 StatesRemovedByMinimization, 146 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 753.4ms SsaConstructionTime, 3528.6ms SatisfiabilityAnalysisTime, 108244.6ms InterpolantComputationTime, 14678 NumberOfCodeBlocks, 14678 NumberOfCodeBlocksAsserted, 1093 NumberOfCheckSat, 14386 ConstructedInterpolants, 0 QuantifiedInterpolants, 134085 SizeOfPredicates, 544 NumberOfNonLiveVariables, 17075 ConjunctsInSsa, 6455 ConjunctsInUnsatCore, 292 InterpolantComputations, 2 PerfectInterpolantSequences, 8694/53181 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