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/Problem15_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:57,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:57,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:57,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:57,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:57,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:57,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:57,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:57,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:57,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:57,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:57,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:57,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:57,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:57,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:57,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:57,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:57,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:57,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:57,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:57,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:57,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:57,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:57,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:57,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:57,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:57,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:57,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:57,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:57,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:57,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:57,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:57,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:57,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:57,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:57,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:57,625 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 [2019-10-13 18:03:57,650 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:57,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:57,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:57,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:57,653 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:57,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:57,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:57,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:57,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:57,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:57,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:57,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:57,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:57,657 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:57,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:57,657 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:57,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:57,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:57,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:57,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:57,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:57,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:57,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:57,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:57,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:57,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:57,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:57,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:57,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:57,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:57,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:57,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:57,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:57,943 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:57,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-10-13 18:03:58,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593e40d24/705f3d2911e24f36a625f31aa083d332/FLAGe9f6f3215 [2019-10-13 18:03:58,731 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:58,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-10-13 18:03:58,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593e40d24/705f3d2911e24f36a625f31aa083d332/FLAGe9f6f3215 [2019-10-13 18:03:58,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593e40d24/705f3d2911e24f36a625f31aa083d332 [2019-10-13 18:03:58,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:58,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:58,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:58,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:58,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:58,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:58" (1/1) ... [2019-10-13 18:03:58,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512d4633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:58, skipping insertion in model container [2019-10-13 18:03:58,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:58" (1/1) ... [2019-10-13 18:03:58,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:58,961 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:59,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:59,942 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:00,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:00,343 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:00,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00 WrapperNode [2019-10-13 18:04:00,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:00,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:00,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:00,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:00,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (1/1) ... [2019-10-13 18:04:00,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:00,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:00,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:00,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:00,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (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 [2019-10-13 18:04:00,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:00,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:00,588 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:00,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:00,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:04,169 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:04,170 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:04,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:04 BoogieIcfgContainer [2019-10-13 18:04:04,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:04,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:04,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:04,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:04,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:58" (1/3) ... [2019-10-13 18:04:04,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc6a16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:04, skipping insertion in model container [2019-10-13 18:04:04,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:00" (2/3) ... [2019-10-13 18:04:04,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc6a16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:04, skipping insertion in model container [2019-10-13 18:04:04,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:04" (3/3) ... [2019-10-13 18:04:04,181 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2019-10-13 18:04:04,192 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:04,202 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:04,215 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:04,247 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:04,248 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:04,248 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:04,248 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:04,248 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:04,248 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:04,249 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:04,249 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 18:04:04,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:04,298 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] [2019-10-13 18:04:04,301 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1729511136, now seen corresponding path program 1 times [2019-10-13 18:04:04,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:04,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636124261] [2019-10-13 18:04:04,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:04,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636124261] [2019-10-13 18:04:04,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:04,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:04,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260693360] [2019-10-13 18:04:04,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:04,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:04,804 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:10,982 INFO L93 Difference]: Finished difference Result 1529 states and 2803 transitions. [2019-10-13 18:04:10,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:10,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-13 18:04:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:11,010 INFO L225 Difference]: With dead ends: 1529 [2019-10-13 18:04:11,010 INFO L226 Difference]: Without dead ends: 1024 [2019-10-13 18:04:11,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-10-13 18:04:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1016. [2019-10-13 18:04:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-10-13 18:04:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1541 transitions. [2019-10-13 18:04:11,162 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1541 transitions. Word has length 38 [2019-10-13 18:04:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:11,163 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1541 transitions. [2019-10-13 18:04:11,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1541 transitions. [2019-10-13 18:04:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 18:04:11,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:11,177 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, 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, 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] [2019-10-13 18:04:11,177 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash 625871070, now seen corresponding path program 1 times [2019-10-13 18:04:11,179 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:11,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445685723] [2019-10-13 18:04:11,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:11,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:11,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:11,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445685723] [2019-10-13 18:04:11,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:11,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:11,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812647842] [2019-10-13 18:04:11,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:11,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:11,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:11,689 INFO L87 Difference]: Start difference. First operand 1016 states and 1541 transitions. Second operand 8 states. [2019-10-13 18:04:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:19,293 INFO L93 Difference]: Finished difference Result 3994 states and 6395 transitions. [2019-10-13 18:04:19,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:19,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 161 [2019-10-13 18:04:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:19,321 INFO L225 Difference]: With dead ends: 3994 [2019-10-13 18:04:19,322 INFO L226 Difference]: Without dead ends: 2984 [2019-10-13 18:04:19,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2019-10-13 18:04:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2934. [2019-10-13 18:04:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-13 18:04:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 3826 transitions. [2019-10-13 18:04:19,478 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 3826 transitions. Word has length 161 [2019-10-13 18:04:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:19,481 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 3826 transitions. [2019-10-13 18:04:19,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 3826 transitions. [2019-10-13 18:04:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-13 18:04:19,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:19,495 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, 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, 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] [2019-10-13 18:04:19,495 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash 420019932, now seen corresponding path program 1 times [2019-10-13 18:04:19,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:19,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881999959] [2019-10-13 18:04:19,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:19,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:19,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 63 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:04:20,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881999959] [2019-10-13 18:04:20,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030351340] [2019-10-13 18:04:20,027 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 [2019-10-13 18:04:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 18:04:20,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 18:04:20,361 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:20,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-10-13 18:04:20,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725396945] [2019-10-13 18:04:20,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:04:20,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:04:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:04:20,373 INFO L87 Difference]: Start difference. First operand 2934 states and 3826 transitions. Second operand 13 states.