/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:11:27,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:11:27,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:11:27,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:11:27,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:11:27,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:11:27,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:11:27,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:11:27,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:11:27,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:11:27,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:11:27,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:11:27,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:11:27,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:11:27,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:11:27,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:11:27,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:11:27,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:11:27,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:11:27,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:11:27,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:11:27,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:11:27,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:11:27,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:11:27,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:11:27,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:11:27,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:11:27,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:11:27,610 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 [2019-11-06 19:11:27,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:11:27,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:11:27,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:11:27,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:11:27,627 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:11:27,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:11:27,627 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:11:27,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:11:27,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:11:27,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:11:27,629 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:11:27,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:11:27,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:11:27,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:11:27,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:11:27,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:11:27,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:11:27,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:11:27,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:11:27,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:11:27,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:11:27,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:11:27,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:11:27,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:11:27,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:11:27,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:11:27,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:11:27,951 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:11:27,952 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:11:27,953 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-11-06 19:11:28,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe88e9c99/1815e516cf3041cdb8ca5872e9972cad/FLAG059d68eae [2019-11-06 19:11:28,877 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:11:28,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-11-06 19:11:28,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe88e9c99/1815e516cf3041cdb8ca5872e9972cad/FLAG059d68eae [2019-11-06 19:11:29,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe88e9c99/1815e516cf3041cdb8ca5872e9972cad [2019-11-06 19:11:29,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:11:29,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:11:29,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:11:29,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:11:29,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:11:29,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:29" (1/1) ... [2019-11-06 19:11:29,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789b381a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:29, skipping insertion in model container [2019-11-06 19:11:29,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:29" (1/1) ... [2019-11-06 19:11:29,358 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:11:29,519 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:11:30,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:11:30,945 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:11:31,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:11:31,539 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:11:31,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31 WrapperNode [2019-11-06 19:11:31,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:11:31,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:11:31,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:11:31,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:11:31,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (1/1) ... [2019-11-06 19:11:31,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:11:31,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:11:31,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:11:31,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:11:31,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (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 [2019-11-06 19:11:31,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:11:31,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:11:31,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:11:31,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:11:31,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:11:31,847 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 19:11:31,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:11:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:11:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:11:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:11:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:11:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:11:36,592 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:11:36,593 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:11:36,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:36 BoogieIcfgContainer [2019-11-06 19:11:36,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:11:36,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:11:36,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:11:36,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:11:36,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:11:29" (1/3) ... [2019-11-06 19:11:36,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d3de94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:36, skipping insertion in model container [2019-11-06 19:11:36,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:31" (2/3) ... [2019-11-06 19:11:36,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d3de94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:36, skipping insertion in model container [2019-11-06 19:11:36,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:36" (3/3) ... [2019-11-06 19:11:36,602 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2019-11-06 19:11:36,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:11:36,619 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:11:36,630 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:11:36,667 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:11:36,667 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:11:36,667 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:11:36,667 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:11:36,667 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:11:36,667 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:11:36,668 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:11:36,668 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:11:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 19:11:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 19:11:36,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:36,713 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:11:36,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1144100014, now seen corresponding path program 1 times [2019-11-06 19:11:36,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:36,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289275407] [2019-11-06 19:11:36,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:37,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289275407] [2019-11-06 19:11:37,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:11:37,126 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:11:37,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966267111] [2019-11-06 19:11:37,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:11:37,134 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:11:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:11:37,150 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-11-06 19:11:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:11:48,830 INFO L93 Difference]: Finished difference Result 3253 states and 6294 transitions. [2019-11-06 19:11:48,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:11:48,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-06 19:11:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:11:48,873 INFO L225 Difference]: With dead ends: 3253 [2019-11-06 19:11:48,874 INFO L226 Difference]: Without dead ends: 2346 [2019-11-06 19:11:48,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:11:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-11-06 19:11:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331. [2019-11-06 19:11:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2331 states. [2019-11-06 19:11:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3787 transitions. [2019-11-06 19:11:49,067 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3787 transitions. Word has length 63 [2019-11-06 19:11:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:11:49,068 INFO L462 AbstractCegarLoop]: Abstraction has 2331 states and 3787 transitions. [2019-11-06 19:11:49,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:11:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3787 transitions. [2019-11-06 19:11:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 19:11:49,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:49,089 INFO L410 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, 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] [2019-11-06 19:11:49,089 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:49,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1744493685, now seen corresponding path program 1 times [2019-11-06 19:11:49,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:49,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890082119] [2019-11-06 19:11:49,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:49,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890082119] [2019-11-06 19:11:49,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045680492] [2019-11-06 19:11:49,478 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 [2019-11-06 19:11:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:49,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:11:49,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:11:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:49,667 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:11:49,667 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:11:49,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466926648] [2019-11-06 19:11:49,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:11:49,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:11:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:11:49,671 INFO L87 Difference]: Start difference. First operand 2331 states and 3787 transitions. Second operand 3 states. [2019-11-06 19:11:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:11:54,219 INFO L93 Difference]: Finished difference Result 6979 states and 11460 transitions. [2019-11-06 19:11:54,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:11:54,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 19:11:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:11:54,253 INFO L225 Difference]: With dead ends: 6979 [2019-11-06 19:11:54,253 INFO L226 Difference]: Without dead ends: 4654 [2019-11-06 19:11:54,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:11:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2019-11-06 19:11:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2019-11-06 19:11:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4654 states. [2019-11-06 19:11:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 7184 transitions. [2019-11-06 19:11:54,481 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 7184 transitions. Word has length 138 [2019-11-06 19:11:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:11:54,482 INFO L462 AbstractCegarLoop]: Abstraction has 4654 states and 7184 transitions. [2019-11-06 19:11:54,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:11:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 7184 transitions. [2019-11-06 19:11:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 19:11:54,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:54,485 INFO L410 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, 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] [2019-11-06 19:11:54,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:11:54,690 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1318770259, now seen corresponding path program 1 times [2019-11-06 19:11:54,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:54,691 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707745057] [2019-11-06 19:11:54,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:54,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707745057] [2019-11-06 19:11:54,990 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:11:54,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:11:54,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524488261] [2019-11-06 19:11:54,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:11:55,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:11:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:11:55,002 INFO L87 Difference]: Start difference. First operand 4654 states and 7184 transitions. Second operand 7 states. [2019-11-06 19:12:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:04,226 INFO L93 Difference]: Finished difference Result 14200 states and 22515 transitions. [2019-11-06 19:12:04,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:12:04,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-06 19:12:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:04,274 INFO L225 Difference]: With dead ends: 14200 [2019-11-06 19:12:04,274 INFO L226 Difference]: Without dead ends: 9552 [2019-11-06 19:12:04,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:12:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9552 states. [2019-11-06 19:12:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9552 to 9439. [2019-11-06 19:12:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9439 states. [2019-11-06 19:12:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 13681 transitions. [2019-11-06 19:12:04,549 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 13681 transitions. Word has length 142 [2019-11-06 19:12:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:04,549 INFO L462 AbstractCegarLoop]: Abstraction has 9439 states and 13681 transitions. [2019-11-06 19:12:04,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:12:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 13681 transitions. [2019-11-06 19:12:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 19:12:04,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:04,553 INFO L410 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, 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] [2019-11-06 19:12:04,553 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 226376034, now seen corresponding path program 1 times [2019-11-06 19:12:04,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:04,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871654931] [2019-11-06 19:12:04,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:04,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871654931] [2019-11-06 19:12:04,835 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:04,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:12:04,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666725360] [2019-11-06 19:12:04,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:12:04,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:12:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:04,838 INFO L87 Difference]: Start difference. First operand 9439 states and 13681 transitions. Second operand 7 states.