/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:38:57,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:38:57,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:38:57,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:38:57,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:38:57,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:38:57,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:38:57,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:38:57,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:38:57,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:38:57,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:38:57,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:38:57,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:38:57,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:38:57,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:38:57,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:38:57,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:38:57,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:38:57,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:38:57,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:38:57,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:38:57,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:38:57,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:38:57,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:38:57,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:38:57,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:38:57,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:38:57,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:38:57,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:38:57,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:38:57,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:38:57,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:38:57,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:38:57,820 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:38:57,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:38:57,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:38:57,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:38:57,822 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:38:57,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:38:57,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:38:57,822 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:38:57,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:38:57,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:38:57,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:38:57,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:38:57,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:38:57,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:38:57,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:38:57,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:38:57,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:38:57,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:38:57,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:38:57,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:38:57,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:38:58,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:38:58,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:38:58,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:38:58,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:38:58,147 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:38:58,148 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-11-23 20:38:58,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480cf4083/10e3b78222374f86951442055f837372/FLAGabb5cc640 [2019-11-23 20:38:58,649 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:38:58,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-11-23 20:38:58,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480cf4083/10e3b78222374f86951442055f837372/FLAGabb5cc640 [2019-11-23 20:38:59,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480cf4083/10e3b78222374f86951442055f837372 [2019-11-23 20:38:59,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:38:59,052 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:38:59,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:59,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:38:59,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:38:59,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c884132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59, skipping insertion in model container [2019-11-23 20:38:59,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:38:59,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:38:59,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:59,324 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:38:59,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:59,454 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:38:59,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59 WrapperNode [2019-11-23 20:38:59,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:59,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:59,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:38:59,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:38:59,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:59,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:38:59,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:38:59,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:38:59,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (1/1) ... [2019-11-23 20:38:59,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:38:59,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:38:59,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:38:59,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:38:59,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (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 [2019-11-23 20:38:59,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:38:59,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:38:59,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:38:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:38:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:38:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:38:59,966 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:38:59,967 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 20:38:59,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:59 BoogieIcfgContainer [2019-11-23 20:38:59,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:38:59,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:38:59,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:38:59,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:38:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:59" (1/3) ... [2019-11-23 20:38:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd91c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:59, skipping insertion in model container [2019-11-23 20:38:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:59" (2/3) ... [2019-11-23 20:38:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd91c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:59, skipping insertion in model container [2019-11-23 20:38:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:59" (3/3) ... [2019-11-23 20:38:59,976 INFO L109 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2019-11-23 20:38:59,984 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:38:59,989 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:39:00,001 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:39:00,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:39:00,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:39:00,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:39:00,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:39:00,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:39:00,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:39:00,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:39:00,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:39:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-23 20:39:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:39:00,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:00,048 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:00,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2019-11-23 20:39:00,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:00,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308756766] [2019-11-23 20:39:00,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:00,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308756766] [2019-11-23 20:39:00,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:00,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:00,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502739463] [2019-11-23 20:39:00,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:39:00,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:39:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:00,249 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-23 20:39:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:00,321 INFO L93 Difference]: Finished difference Result 68 states and 103 transitions. [2019-11-23 20:39:00,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:39:00,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:39:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:00,334 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:39:00,334 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:39:00,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:39:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:39:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:39:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:39:00,375 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2019-11-23 20:39:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:00,376 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:39:00,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:39:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:39:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:39:00,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:00,379 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:00,380 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1234920103, now seen corresponding path program 1 times [2019-11-23 20:39:00,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:00,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854599962] [2019-11-23 20:39:00,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:00,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854599962] [2019-11-23 20:39:00,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914791917] [2019-11-23 20:39:00,492 INFO L94 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 [2019-11-23 20:39:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:00,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:00,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:39:00,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:00,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 20:39:00,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628874285] [2019-11-23 20:39:00,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:00,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:00,626 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2019-11-23 20:39:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:00,709 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-23 20:39:00,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:00,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:39:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:00,712 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:39:00,712 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:39:00,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:39:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2019-11-23 20:39:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:39:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-23 20:39:00,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 16 [2019-11-23 20:39:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:00,721 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-23 20:39:00,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-23 20:39:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:39:00,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:00,723 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:00,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:00,935 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash 654159451, now seen corresponding path program 1 times [2019-11-23 20:39:00,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:00,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818677399] [2019-11-23 20:39:00,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:39:01,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818677399] [2019-11-23 20:39:01,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039682708] [2019-11-23 20:39:01,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:01,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:39:01,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:01,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:39:01,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811323079] [2019-11-23 20:39:01,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:39:01,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:39:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:01,142 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 7 states. [2019-11-23 20:39:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,340 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2019-11-23 20:39:01,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:39:01,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:39:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,342 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:39:01,342 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:39:01,343 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:39:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:39:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 41. [2019-11-23 20:39:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:39:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 20:39:01,353 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 18 [2019-11-23 20:39:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,353 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 20:39:01,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:39:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 20:39:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:39:01,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,355 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2125240067, now seen corresponding path program 2 times [2019-11-23 20:39:01,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767581262] [2019-11-23 20:39:01,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:39:01,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767581262] [2019-11-23 20:39:01,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:01,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:01,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107389412] [2019-11-23 20:39:01,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:39:01,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:39:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:01,617 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 3 states. [2019-11-23 20:39:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,642 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2019-11-23 20:39:01,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:39:01,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:39:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,644 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:39:01,645 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:39:01,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:39:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:39:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:39:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-11-23 20:39:01,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 23 [2019-11-23 20:39:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,652 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-11-23 20:39:01,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:39:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-11-23 20:39:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:39:01,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,654 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,654 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1867074629, now seen corresponding path program 1 times [2019-11-23 20:39:01,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317046175] [2019-11-23 20:39:01,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:39:01,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317046175] [2019-11-23 20:39:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:01,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413830898] [2019-11-23 20:39:01,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:01,744 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2019-11-23 20:39:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,803 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2019-11-23 20:39:01,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:01,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:39:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,804 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:39:01,804 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:39:01,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:39:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2019-11-23 20:39:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:39:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:39:01,812 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2019-11-23 20:39:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,812 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:39:01,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:39:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:39:01,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,814 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,814 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash -8514297, now seen corresponding path program 1 times [2019-11-23 20:39:01,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734170578] [2019-11-23 20:39:01,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:39:01,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734170578] [2019-11-23 20:39:01,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:01,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:01,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85330962] [2019-11-23 20:39:01,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:01,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:01,912 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 4 states. [2019-11-23 20:39:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,953 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2019-11-23 20:39:01,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:01,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-23 20:39:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,956 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:39:01,956 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:39:01,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:39:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2019-11-23 20:39:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:39:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-11-23 20:39:01,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 29 [2019-11-23 20:39:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,965 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-11-23 20:39:01,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-11-23 20:39:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:39:01,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,967 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,967 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1651673519, now seen corresponding path program 1 times [2019-11-23 20:39:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941853632] [2019-11-23 20:39:01,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:39:02,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941853632] [2019-11-23 20:39:02,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:02,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:02,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427320866] [2019-11-23 20:39:02,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:02,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:02,009 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2019-11-23 20:39:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:02,048 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2019-11-23 20:39:02,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:02,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-23 20:39:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:02,050 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:39:02,050 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:39:02,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:39:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-11-23 20:39:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:39:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-11-23 20:39:02,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2019-11-23 20:39:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:02,070 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-11-23 20:39:02,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-11-23 20:39:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:39:02,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:02,074 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:02,074 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -293969555, now seen corresponding path program 1 times [2019-11-23 20:39:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:02,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434516578] [2019-11-23 20:39:02,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:39:02,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434516578] [2019-11-23 20:39:02,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141539905] [2019-11-23 20:39:02,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:39:02,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:39:02,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:02,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 20:39:02,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153375614] [2019-11-23 20:39:02,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:39:02,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:39:02,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:39:02,293 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2019-11-23 20:39:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:02,421 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2019-11-23 20:39:02,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:39:02,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-23 20:39:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:02,422 INFO L225 Difference]: With dead ends: 115 [2019-11-23 20:39:02,422 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:39:02,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:39:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:39:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2019-11-23 20:39:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:39:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-23 20:39:02,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2019-11-23 20:39:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:02,439 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-23 20:39:02,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:39:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-23 20:39:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:39:02,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:02,440 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:02,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,643 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 622364399, now seen corresponding path program 2 times [2019-11-23 20:39:02,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:02,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108258036] [2019-11-23 20:39:02,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:39:02,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108258036] [2019-11-23 20:39:02,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656259399] [2019-11-23 20:39:02,755 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:02,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:02,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:39:02,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:39:02,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:02,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:39:02,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404339946] [2019-11-23 20:39:02,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:39:02,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:39:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:39:02,918 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2019-11-23 20:39:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:03,055 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2019-11-23 20:39:03,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:39:03,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-23 20:39:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:03,063 INFO L225 Difference]: With dead ends: 129 [2019-11-23 20:39:03,064 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:39:03,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:39:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:39:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2019-11-23 20:39:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:39:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-23 20:39:03,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2019-11-23 20:39:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:03,086 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-23 20:39:03,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:39:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-23 20:39:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:39:03,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:03,089 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,290 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 3 times [2019-11-23 20:39:03,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384298002] [2019-11-23 20:39:03,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:39:03,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384298002] [2019-11-23 20:39:03,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594268897] [2019-11-23 20:39:03,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:39:03,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:03,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:03,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:39:03,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:03,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-23 20:39:03,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741158129] [2019-11-23 20:39:03,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:39:03,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:39:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:39:03,482 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2019-11-23 20:39:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:03,672 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2019-11-23 20:39:03,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:39:03,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-23 20:39:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:03,674 INFO L225 Difference]: With dead ends: 159 [2019-11-23 20:39:03,674 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:39:03,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:39:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:39:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 57. [2019-11-23 20:39:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:39:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-23 20:39:03,684 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 34 [2019-11-23 20:39:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:03,684 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-23 20:39:03,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:39:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-23 20:39:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:39:03,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:03,685 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,889 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,890 INFO L82 PathProgramCache]: Analyzing trace with hash 590995391, now seen corresponding path program 1 times [2019-11-23 20:39:03,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485056115] [2019-11-23 20:39:03,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:39:04,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485056115] [2019-11-23 20:39:04,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847851476] [2019-11-23 20:39:04,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:39:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:39:04,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:04,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-23 20:39:04,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399738006] [2019-11-23 20:39:04,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:39:04,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:39:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:39:04,183 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 15 states. [2019-11-23 20:39:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,345 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2019-11-23 20:39:04,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:39:04,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2019-11-23 20:39:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,347 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:39:04,347 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:39:04,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:39:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:39:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 59. [2019-11-23 20:39:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:39:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-11-23 20:39:04,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 42 [2019-11-23 20:39:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,356 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-11-23 20:39:04,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:39:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-11-23 20:39:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:39:04,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,357 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:04,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,561 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1800524353, now seen corresponding path program 2 times [2019-11-23 20:39:04,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:04,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947605075] [2019-11-23 20:39:04,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:39:04,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947605075] [2019-11-23 20:39:04,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879108308] [2019-11-23 20:39:04,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:04,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:04,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:39:04,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:04,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 20:39:04,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273611630] [2019-11-23 20:39:04,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:39:04,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:39:04,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:39:04,821 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 17 states. [2019-11-23 20:39:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,991 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2019-11-23 20:39:04,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:39:04,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-11-23 20:39:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,992 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:39:04,992 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:39:04,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:39:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:39:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 61. [2019-11-23 20:39:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:39:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-23 20:39:05,001 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 44 [2019-11-23 20:39:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:05,001 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-23 20:39:05,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:39:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-23 20:39:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:39:05,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:05,002 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:05,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,215 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash 221719619, now seen corresponding path program 3 times [2019-11-23 20:39:05,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:05,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445897328] [2019-11-23 20:39:05,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:39:05,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445897328] [2019-11-23 20:39:05,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100365675] [2019-11-23 20:39:05,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:39:05,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:39:05,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:05,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:39:05,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 20:39:05,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:05,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-23 20:39:05,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649957164] [2019-11-23 20:39:05,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:39:05,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:39:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:39:05,454 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 14 states. [2019-11-23 20:39:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:05,897 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2019-11-23 20:39:05,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:39:05,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-11-23 20:39:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:05,899 INFO L225 Difference]: With dead ends: 268 [2019-11-23 20:39:05,899 INFO L226 Difference]: Without dead ends: 224 [2019-11-23 20:39:05,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:39:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-11-23 20:39:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 76. [2019-11-23 20:39:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:39:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-11-23 20:39:05,909 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 46 [2019-11-23 20:39:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:05,910 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-11-23 20:39:05,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:39:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-11-23 20:39:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:39:05,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:05,911 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:06,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:06,115 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1561519059, now seen corresponding path program 4 times [2019-11-23 20:39:06,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:06,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715718522] [2019-11-23 20:39:06,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 20:39:06,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715718522] [2019-11-23 20:39:06,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013534284] [2019-11-23 20:39:06,220 INFO L92 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 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 [2019-11-23 20:39:06,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:06,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:06,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:39:06,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:06,324 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:39:06,325 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:06,342 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:06,343 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:06,343 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2019-11-23 20:39:06,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:39:06,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:06,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2019-11-23 20:39:06,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924494603] [2019-11-23 20:39:06,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:39:06,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:39:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:39:06,576 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 18 states. [2019-11-23 20:39:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:07,782 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2019-11-23 20:39:07,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:39:07,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2019-11-23 20:39:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:07,787 INFO L225 Difference]: With dead ends: 295 [2019-11-23 20:39:07,787 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:39:07,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=2511, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:39:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:39:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 82. [2019-11-23 20:39:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:39:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2019-11-23 20:39:07,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 51 [2019-11-23 20:39:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:07,799 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2019-11-23 20:39:07,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:39:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2019-11-23 20:39:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:39:07,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:07,800 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:08,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,005 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash 658499951, now seen corresponding path program 1 times [2019-11-23 20:39:08,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:08,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510281813] [2019-11-23 20:39:08,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:39:08,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510281813] [2019-11-23 20:39:08,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917050826] [2019-11-23 20:39:08,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:39:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:39:08,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:39:08,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:08,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-23 20:39:08,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827672670] [2019-11-23 20:39:08,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:39:08,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:39:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:39:08,365 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 23 states. [2019-11-23 20:39:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:08,687 INFO L93 Difference]: Finished difference Result 256 states and 284 transitions. [2019-11-23 20:39:08,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:39:08,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2019-11-23 20:39:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:08,689 INFO L225 Difference]: With dead ends: 256 [2019-11-23 20:39:08,689 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:39:08,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:39:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:39:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 84. [2019-11-23 20:39:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:39:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-11-23 20:39:08,697 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 55 [2019-11-23 20:39:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:08,697 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-11-23 20:39:08,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:39:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-11-23 20:39:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:39:08,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:08,698 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:08,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,902 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1472305709, now seen corresponding path program 2 times [2019-11-23 20:39:08,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:08,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764006969] [2019-11-23 20:39:08,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:39:09,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764006969] [2019-11-23 20:39:09,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359197444] [2019-11-23 20:39:09,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-23 20:39:09,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:09,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:09,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:39:09,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:39:09,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:09,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-11-23 20:39:09,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516076200] [2019-11-23 20:39:09,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:39:09,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:39:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:09,306 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2019-11-23 20:39:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:09,637 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2019-11-23 20:39:09,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:39:09,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-11-23 20:39:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:09,639 INFO L225 Difference]: With dead ends: 270 [2019-11-23 20:39:09,639 INFO L226 Difference]: Without dead ends: 209 [2019-11-23 20:39:09,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-23 20:39:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 86. [2019-11-23 20:39:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:39:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-11-23 20:39:09,647 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 57 [2019-11-23 20:39:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:09,647 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-11-23 20:39:09,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:39:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-11-23 20:39:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:39:09,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:09,648 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,852 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1855591275, now seen corresponding path program 3 times [2019-11-23 20:39:09,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35763195] [2019-11-23 20:39:09,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:39:10,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35763195] [2019-11-23 20:39:10,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169959495] [2019-11-23 20:39:10,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:39:10,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:39:10,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:10,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:39:10,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:39:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:10,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-23 20:39:10,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750282493] [2019-11-23 20:39:10,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:39:10,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:39:10,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:39:10,198 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 18 states. [2019-11-23 20:39:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:10,675 INFO L93 Difference]: Finished difference Result 305 states and 342 transitions. [2019-11-23 20:39:10,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:39:10,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2019-11-23 20:39:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:10,678 INFO L225 Difference]: With dead ends: 305 [2019-11-23 20:39:10,678 INFO L226 Difference]: Without dead ends: 244 [2019-11-23 20:39:10,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=541, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:39:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-23 20:39:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2019-11-23 20:39:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:39:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2019-11-23 20:39:10,695 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 59 [2019-11-23 20:39:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:10,695 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2019-11-23 20:39:10,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:39:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2019-11-23 20:39:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:39:10,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:10,697 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:10,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:10,902 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash -736007971, now seen corresponding path program 4 times [2019-11-23 20:39:10,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:10,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435080689] [2019-11-23 20:39:10,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:39:11,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435080689] [2019-11-23 20:39:11,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244929770] [2019-11-23 20:39:11,089 INFO L92 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 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 [2019-11-23 20:39:11,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:11,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:11,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:39:11,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:11,170 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:39:11,171 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:11,176 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:11,177 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:11,177 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2019-11-23 20:39:11,331 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:11,332 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:11,334 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:11,335 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:11,336 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2019-11-23 20:39:11,337 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:11,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:11,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:39:11,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-23 20:39:20,024 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-23 20:39:24,101 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2019-11-23 20:39:24,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:39:24,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:24,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2019-11-23 20:39:24,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605124551] [2019-11-23 20:39:24,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:39:24,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:39:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=513, Unknown=5, NotChecked=0, Total=650 [2019-11-23 20:39:24,167 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 26 states. [2019-11-23 20:40:08,636 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 28 [2019-11-23 20:40:39,984 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 30