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/Problem03_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:22,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:22,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:22,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 21:54:22,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:22,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:22,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:22,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:22,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:22,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:22,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:22,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:22,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:22,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:22,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:22,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:22,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:22,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:22,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:22,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:22,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:22,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:22,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:22,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:22,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:22,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:22,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:22,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:22,565 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 21:54:22,580 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:22,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:22,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:22,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:22,582 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:22,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:22,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:22,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:22,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:22,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:22,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:22,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:22,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:22,584 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:22,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:22,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:22,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:22,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:22,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:22,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:22,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:22,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:22,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:22,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:22,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:22,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:22,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:22,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:22,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:22,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:22,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:22,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:22,885 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:22,885 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:22,886 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2019-10-14 21:54:22,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a208d78fe/d4f9b829aa574cc59e0af45b5c31c6e8/FLAG02762e38c [2019-10-14 21:54:23,597 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:23,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2019-10-14 21:54:23,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a208d78fe/d4f9b829aa574cc59e0af45b5c31c6e8/FLAG02762e38c [2019-10-14 21:54:23,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a208d78fe/d4f9b829aa574cc59e0af45b5c31c6e8 [2019-10-14 21:54:23,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:23,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:23,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:23,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:23,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:23,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:23" (1/1) ... [2019-10-14 21:54:23,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:23, skipping insertion in model container [2019-10-14 21:54:23,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:23" (1/1) ... [2019-10-14 21:54:23,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:23,924 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:24,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:24,741 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:25,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:25,107 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:25,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25 WrapperNode [2019-10-14 21:54:25,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:25,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:25,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:25,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:25,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:25,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:25,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:25,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:25,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (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 21:54:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:25,386 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:25,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:27,378 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:27,379 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:27,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:27 BoogieIcfgContainer [2019-10-14 21:54:27,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:27,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:27,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:27,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:27,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:23" (1/3) ... [2019-10-14 21:54:27,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:27, skipping insertion in model container [2019-10-14 21:54:27,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25" (2/3) ... [2019-10-14 21:54:27,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:27, skipping insertion in model container [2019-10-14 21:54:27,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:27" (3/3) ... [2019-10-14 21:54:27,405 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label24.c [2019-10-14 21:54:27,424 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:27,437 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:27,454 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:27,508 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:27,509 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:27,509 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:27,510 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:27,510 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:27,510 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:27,511 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:27,511 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-14 21:54:27,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:27,592 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, 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, 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 21:54:27,598 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1879577704, now seen corresponding path program 1 times [2019-10-14 21:54:27,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:27,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-14 21:54:27,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:27,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:27,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,623 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,855 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 21:54:28,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-14 21:54:28,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:28,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:28,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779898230] [2019-10-14 21:54:28,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:28,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:28,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:28,885 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:29,106 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:29,573 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:33,495 INFO L93 Difference]: Finished difference Result 1111 states and 1980 transitions. [2019-10-14 21:54:33,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:33,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2019-10-14 21:54:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:33,531 INFO L225 Difference]: With dead ends: 1111 [2019-10-14 21:54:33,531 INFO L226 Difference]: Without dead ends: 703 [2019-10-14 21:54:33,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-10-14 21:54:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 467. [2019-10-14 21:54:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-14 21:54:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 718 transitions. [2019-10-14 21:54:33,670 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 718 transitions. Word has length 197 [2019-10-14 21:54:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:33,672 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 718 transitions. [2019-10-14 21:54:33,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 718 transitions. [2019-10-14 21:54:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-14 21:54:33,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:33,680 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 21:54:33,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 380333484, now seen corresponding path program 1 times [2019-10-14 21:54:33,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:33,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216817699] [2019-10-14 21:54:33,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,057 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216817699] [2019-10-14 21:54:34,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070469207] [2019-10-14 21:54:34,283 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 21:54:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:34,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,594 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:34,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:34,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546395396] [2019-10-14 21:54:34,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:34,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:34,600 INFO L87 Difference]: Start difference. First operand 467 states and 718 transitions. Second operand 5 states. [2019-10-14 21:54:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:36,217 INFO L93 Difference]: Finished difference Result 1401 states and 2184 transitions. [2019-10-14 21:54:36,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:36,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2019-10-14 21:54:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:36,223 INFO L225 Difference]: With dead ends: 1401 [2019-10-14 21:54:36,224 INFO L226 Difference]: Without dead ends: 940 [2019-10-14 21:54:36,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2019-10-14 21:54:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 924. [2019-10-14 21:54:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-10-14 21:54:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1410 transitions. [2019-10-14 21:54:36,272 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1410 transitions. Word has length 209 [2019-10-14 21:54:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:36,272 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1410 transitions. [2019-10-14 21:54:36,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1410 transitions. [2019-10-14 21:54:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-14 21:54:36,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:36,277 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 21:54:36,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:36,483 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2072803421, now seen corresponding path program 1 times [2019-10-14 21:54:36,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:36,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-14 21:54:36,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,713 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:36,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-14 21:54:36,966 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:36,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:54:36,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977997553] [2019-10-14 21:54:36,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:54:36,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:54:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:36,969 INFO L87 Difference]: Start difference. First operand 924 states and 1410 transitions. Second operand 9 states. [2019-10-14 21:54:37,248 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:37,669 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:38,127 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:41,761 INFO L93 Difference]: Finished difference Result 3638 states and 5797 transitions. [2019-10-14 21:54:41,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:41,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 210 [2019-10-14 21:54:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:41,780 INFO L225 Difference]: With dead ends: 3638 [2019-10-14 21:54:41,781 INFO L226 Difference]: Without dead ends: 2720 [2019-10-14 21:54:41,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:54:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2019-10-14 21:54:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2680. [2019-10-14 21:54:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2680 states. [2019-10-14 21:54:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3915 transitions. [2019-10-14 21:54:41,885 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3915 transitions. Word has length 210 [2019-10-14 21:54:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:41,885 INFO L462 AbstractCegarLoop]: Abstraction has 2680 states and 3915 transitions. [2019-10-14 21:54:41,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:54:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3915 transitions. [2019-10-14 21:54:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-14 21:54:41,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:41,895 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 21:54:41,895 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1077912688, now seen corresponding path program 1 times [2019-10-14 21:54:41,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:41,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644508981] [2019-10-14 21:54:41,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:41,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:41,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,180 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:42,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644508981] [2019-10-14 21:54:42,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963291732] [2019-10-14 21:54:42,405 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 21:54:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:42,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:42,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:42,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:42,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506709531] [2019-10-14 21:54:42,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:42,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:42,671 INFO L87 Difference]: Start difference. First operand 2680 states and 3915 transitions. Second operand 3 states. [2019-10-14 21:54:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:43,855 INFO L93 Difference]: Finished difference Result 7946 states and 11955 transitions. [2019-10-14 21:54:43,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:43,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2019-10-14 21:54:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:43,892 INFO L225 Difference]: With dead ends: 7946 [2019-10-14 21:54:43,892 INFO L226 Difference]: Without dead ends: 5272 [2019-10-14 21:54:43,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5272 states. [2019-10-14 21:54:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5272 to 5234. [2019-10-14 21:54:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2019-10-14 21:54:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 7689 transitions. [2019-10-14 21:54:44,073 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 7689 transitions. Word has length 211 [2019-10-14 21:54:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:44,074 INFO L462 AbstractCegarLoop]: Abstraction has 5234 states and 7689 transitions. [2019-10-14 21:54:44,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 7689 transitions. [2019-10-14 21:54:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-14 21:54:44,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:44,091 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-14 21:54:44,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:44,303 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2120184752, now seen corresponding path program 1 times [2019-10-14 21:54:44,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:44,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323715904] [2019-10-14 21:54:44,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:44,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323715904] [2019-10-14 21:54:44,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422552907] [2019-10-14 21:54:44,696 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 21:54:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:44,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:54:45,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:45,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:45,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166739628] [2019-10-14 21:54:45,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:45,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:45,093 INFO L87 Difference]: Start difference. First operand 5234 states and 7689 transitions. Second operand 3 states. [2019-10-14 21:54:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:46,196 INFO L93 Difference]: Finished difference Result 10464 states and 15398 transitions. [2019-10-14 21:54:46,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:46,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2019-10-14 21:54:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:46,227 INFO L225 Difference]: With dead ends: 10464 [2019-10-14 21:54:46,227 INFO L226 Difference]: Without dead ends: 5236 [2019-10-14 21:54:46,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2019-10-14 21:54:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 5234. [2019-10-14 21:54:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2019-10-14 21:54:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 7483 transitions. [2019-10-14 21:54:46,382 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 7483 transitions. Word has length 235 [2019-10-14 21:54:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:46,382 INFO L462 AbstractCegarLoop]: Abstraction has 5234 states and 7483 transitions. [2019-10-14 21:54:46,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 7483 transitions. [2019-10-14 21:54:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-14 21:54:46,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:46,400 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-10-14 21:54:46,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:46,605 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1677850078, now seen corresponding path program 1 times [2019-10-14 21:54:46,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:46,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279427850] [2019-10-14 21:54:46,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,922 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:47,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279427850] [2019-10-14 21:54:47,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045244554] [2019-10-14 21:54:47,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:47,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:47,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:47,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:47,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:54:47,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660573732] [2019-10-14 21:54:47,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:47,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:47,429 INFO L87 Difference]: Start difference. First operand 5234 states and 7483 transitions. Second operand 8 states. [2019-10-14 21:54:47,693 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:48,118 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:52,791 INFO L93 Difference]: Finished difference Result 13355 states and 20128 transitions. [2019-10-14 21:54:52,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:54:52,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 261 [2019-10-14 21:54:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:52,842 INFO L225 Difference]: With dead ends: 13355 [2019-10-14 21:54:52,842 INFO L226 Difference]: Without dead ends: 8127 [2019-10-14 21:54:52,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2019-10-14 21:54:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 8025. [2019-10-14 21:54:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8025 states. [2019-10-14 21:54:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8025 states to 8025 states and 11366 transitions. [2019-10-14 21:54:53,138 INFO L78 Accepts]: Start accepts. Automaton has 8025 states and 11366 transitions. Word has length 261 [2019-10-14 21:54:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:53,139 INFO L462 AbstractCegarLoop]: Abstraction has 8025 states and 11366 transitions. [2019-10-14 21:54:53,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 8025 states and 11366 transitions. [2019-10-14 21:54:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-10-14 21:54:53,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:53,178 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, 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, 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] [2019-10-14 21:54:53,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:53,383 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -584902122, now seen corresponding path program 1 times [2019-10-14 21:54:53,385 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:53,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136956878] [2019-10-14 21:54:53,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,623 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:53,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136956878] [2019-10-14 21:54:53,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272325122] [2019-10-14 21:54:53,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:54,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:54:54,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:54,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:54:54,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829653057] [2019-10-14 21:54:54,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:54,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:54,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:54,283 INFO L87 Difference]: Start difference. First operand 8025 states and 11366 transitions. Second operand 5 states. [2019-10-14 21:54:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:56,182 INFO L93 Difference]: Finished difference Result 22511 states and 34173 transitions. [2019-10-14 21:54:56,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:56,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2019-10-14 21:54:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:56,250 INFO L225 Difference]: With dead ends: 22511 [2019-10-14 21:54:56,250 INFO L226 Difference]: Without dead ends: 14500 [2019-10-14 21:54:56,277 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:54:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14500 states. [2019-10-14 21:54:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14500 to 14334. [2019-10-14 21:54:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2019-10-14 21:54:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 19354 transitions. [2019-10-14 21:54:56,852 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 19354 transitions. Word has length 267 [2019-10-14 21:54:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:56,853 INFO L462 AbstractCegarLoop]: Abstraction has 14334 states and 19354 transitions. [2019-10-14 21:54:56,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 19354 transitions. [2019-10-14 21:54:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-10-14 21:54:56,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:56,905 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, 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, 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] [2019-10-14 21:54:57,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:57,119 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -264641318, now seen corresponding path program 1 times [2019-10-14 21:54:57,120 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:57,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667883186] [2019-10-14 21:54:57,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,453 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat