java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:36,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:36,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:36,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:36,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:36,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:36,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:36,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:36,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:36,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:36,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:36,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:36,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:36,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:36,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:36,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:36,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:36,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:36,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:36,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:36,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:36,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:36,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:36,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:36,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:37,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:37,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:37,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:37,016 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 [2019-10-14 22:04:37,041 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:37,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:37,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:37,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:37,045 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:37,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:37,045 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:37,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:37,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:37,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:37,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:37,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:37,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:37,048 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:37,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:37,048 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:37,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:37,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:37,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:37,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:37,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:37,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:37,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:37,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:37,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:37,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:37,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:37,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:37,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:37,355 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:37,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:37,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:37,373 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:37,374 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:37,374 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-10-14 22:04:37,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48c64e26/90ff89028d014178baa49bf66fadb8a4/FLAG960da7af3 [2019-10-14 22:04:38,076 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:38,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-10-14 22:04:38,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48c64e26/90ff89028d014178baa49bf66fadb8a4/FLAG960da7af3 [2019-10-14 22:04:38,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48c64e26/90ff89028d014178baa49bf66fadb8a4 [2019-10-14 22:04:38,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:38,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:38,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:38,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:38,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:38,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:38" (1/1) ... [2019-10-14 22:04:38,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d281660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:38, skipping insertion in model container [2019-10-14 22:04:38,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:38" (1/1) ... [2019-10-14 22:04:38,331 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:38,411 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:39,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:39,260 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:39,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:39,767 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:39,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39 WrapperNode [2019-10-14 22:04:39,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:39,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:39,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:39,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:39,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (1/1) ... [2019-10-14 22:04:39,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:39,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:39,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:39,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:39,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (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 [2019-10-14 22:04:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:40,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:40,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:42,523 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:42,524 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:42,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:42 BoogieIcfgContainer [2019-10-14 22:04:42,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:42,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:42,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:42,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:42,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:38" (1/3) ... [2019-10-14 22:04:42,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2cac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:42, skipping insertion in model container [2019-10-14 22:04:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:39" (2/3) ... [2019-10-14 22:04:42,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2cac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:42, skipping insertion in model container [2019-10-14 22:04:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:42" (3/3) ... [2019-10-14 22:04:42,535 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-10-14 22:04:42,547 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:42,557 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:42,571 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:42,611 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:42,611 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:42,611 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:42,611 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:42,612 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:42,612 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:42,612 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:42,612 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 22:04:42,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:42,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:42,653 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash 697070738, now seen corresponding path program 1 times [2019-10-14 22:04:42,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:42,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833812046] [2019-10-14 22:04:42,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:42,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:42,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:43,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833812046] [2019-10-14 22:04:43,084 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:43,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:43,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242266162] [2019-10-14 22:04:43,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:43,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:43,109 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:48,028 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-10-14 22:04:48,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:48,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-10-14 22:04:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:48,059 INFO L225 Difference]: With dead ends: 1530 [2019-10-14 22:04:48,059 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:48,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-10-14 22:04:48,200 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 55 [2019-10-14 22:04:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:48,201 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-10-14 22:04:48,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-10-14 22:04:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 22:04:48,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:48,208 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:48,209 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1449951553, now seen corresponding path program 1 times [2019-10-14 22:04:48,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:48,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805808898] [2019-10-14 22:04:48,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:48,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805808898] [2019-10-14 22:04:48,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:48,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:04:48,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46947815] [2019-10-14 22:04:48,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:04:48,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:04:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:04:48,508 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-10-14 22:04:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:52,147 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-10-14 22:04:52,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:52,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-10-14 22:04:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:52,170 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:04:52,170 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:04:52,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:04:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:04:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-10-14 22:04:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-10-14 22:04:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-10-14 22:04:52,270 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 124 [2019-10-14 22:04:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:52,272 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-10-14 22:04:52,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:04:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-10-14 22:04:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 22:04:52,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:52,287 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:52,287 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1240041174, now seen corresponding path program 1 times [2019-10-14 22:04:52,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:52,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389950667] [2019-10-14 22:04:52,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:52,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:52,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:52,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389950667] [2019-10-14 22:04:52,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:52,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:52,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479745527] [2019-10-14 22:04:52,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:52,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:52,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:52,613 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-10-14 22:04:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:57,577 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-10-14 22:04:57,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:04:57,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2019-10-14 22:04:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:57,597 INFO L225 Difference]: With dead ends: 4170 [2019-10-14 22:04:57,597 INFO L226 Difference]: Without dead ends: 2792 [2019-10-14 22:04:57,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:04:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-14 22:04:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-10-14 22:04:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-10-14 22:04:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3895 transitions. [2019-10-14 22:04:57,696 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3895 transitions. Word has length 127 [2019-10-14 22:04:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:57,698 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3895 transitions. [2019-10-14 22:04:57,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3895 transitions. [2019-10-14 22:04:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-14 22:04:57,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:57,706 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:57,706 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1333014138, now seen corresponding path program 1 times [2019-10-14 22:04:57,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:57,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153816834] [2019-10-14 22:04:57,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:57,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:57,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:58,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153816834] [2019-10-14 22:04:58,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328177276] [2019-10-14 22:04:58,098 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 [2019-10-14 22:04:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:58,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 22:04:58,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:58,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:58,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406721637] [2019-10-14 22:04:58,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:58,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:58,407 INFO L87 Difference]: Start difference. First operand 2773 states and 3895 transitions. Second operand 5 states. [2019-10-14 22:05:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:01,933 INFO L93 Difference]: Finished difference Result 7666 states and 11136 transitions. [2019-10-14 22:05:01,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:05:01,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-10-14 22:05:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:01,963 INFO L225 Difference]: With dead ends: 7666 [2019-10-14 22:05:01,963 INFO L226 Difference]: Without dead ends: 4899 [2019-10-14 22:05:01,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:05:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2019-10-14 22:05:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4868. [2019-10-14 22:05:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4868 states. [2019-10-14 22:05:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 6452 transitions. [2019-10-14 22:05:02,111 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 6452 transitions. Word has length 247 [2019-10-14 22:05:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:02,113 INFO L462 AbstractCegarLoop]: Abstraction has 4868 states and 6452 transitions. [2019-10-14 22:05:02,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 6452 transitions. [2019-10-14 22:05:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-10-14 22:05:02,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:02,125 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:02,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:02,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash -901742510, now seen corresponding path program 1 times [2019-10-14 22:05:02,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:02,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438099520] [2019-10-14 22:05:02,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 277 proven. 151 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2019-10-14 22:05:02,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438099520] [2019-10-14 22:05:02,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529113949] [2019-10-14 22:05:02,822 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 [2019-10-14 22:05:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:02,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-10-14 22:05:03,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:03,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:05:03,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433232224] [2019-10-14 22:05:03,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:03,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:03,150 INFO L87 Difference]: Start difference. First operand 4868 states and 6452 transitions. Second operand 11 states. [2019-10-14 22:05:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:07,326 INFO L93 Difference]: Finished difference Result 12166 states and 16609 transitions. [2019-10-14 22:05:07,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:07,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 393 [2019-10-14 22:05:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:07,361 INFO L225 Difference]: With dead ends: 12166 [2019-10-14 22:05:07,361 INFO L226 Difference]: Without dead ends: 7304 [2019-10-14 22:05:07,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 402 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2019-10-14 22:05:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 5220. [2019-10-14 22:05:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5220 states. [2019-10-14 22:05:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6864 transitions. [2019-10-14 22:05:07,525 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6864 transitions. Word has length 393 [2019-10-14 22:05:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:07,526 INFO L462 AbstractCegarLoop]: Abstraction has 5220 states and 6864 transitions. [2019-10-14 22:05:07,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6864 transitions. [2019-10-14 22:05:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2019-10-14 22:05:07,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:07,543 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:07,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:07,760 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1396775246, now seen corresponding path program 1 times [2019-10-14 22:05:07,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:07,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438003919] [2019-10-14 22:05:07,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:07,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:07,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 297 proven. 227 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-10-14 22:05:08,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438003919] [2019-10-14 22:05:08,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524715142] [2019-10-14 22:05:08,706 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 [2019-10-14 22:05:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:08,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 690 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 22:05:09,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:09,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:05:09,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301523181] [2019-10-14 22:05:09,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:05:09,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:05:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:09,052 INFO L87 Difference]: Start difference. First operand 5220 states and 6864 transitions. Second operand 12 states.