java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:58,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:58,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:58,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:58,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:58,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:58,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:58,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:58,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:58,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:58,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:58,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:58,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:58,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:58,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:58,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:58,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:58,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:58,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:58,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:58,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:58,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:58,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:58,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:58,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:58,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:58,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:58,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:58,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:58,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:58,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:58,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:58,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:58,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:58,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:58,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:58,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:05:58,831 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:58,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:58,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:58,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:58,833 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:58,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:58,834 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:58,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:58,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:58,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:58,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:58,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:58,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:58,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:58,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:58,837 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:58,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:58,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:58,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:58,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:58,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:58,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:58,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:58,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:58,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:58,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:58,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:58,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:58,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:59,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:59,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:59,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:59,164 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:59,164 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:59,164 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-13 18:05:59,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eebbc9cd/43e6e28b88af4011ab99b1db576a2be6/FLAG56f468c1e [2019-10-13 18:05:59,876 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:59,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-13 18:05:59,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eebbc9cd/43e6e28b88af4011ab99b1db576a2be6/FLAG56f468c1e [2019-10-13 18:06:00,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eebbc9cd/43e6e28b88af4011ab99b1db576a2be6 [2019-10-13 18:06:00,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:00,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:00,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:00,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:00,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:00,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:00" (1/1) ... [2019-10-13 18:06:00,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641eaed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:00, skipping insertion in model container [2019-10-13 18:06:00,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:00" (1/1) ... [2019-10-13 18:06:00,118 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:00,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:01,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:01,114 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:01,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:01,485 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:01,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01 WrapperNode [2019-10-13 18:06:01,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:01,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:01,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:01,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:01,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... [2019-10-13 18:06:01,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:01,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:01,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:01,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:01,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:01,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:04,341 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:04,342 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:04,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:04 BoogieIcfgContainer [2019-10-13 18:06:04,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:04,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:04,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:04,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:04,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:00" (1/3) ... [2019-10-13 18:06:04,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587d51c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:04, skipping insertion in model container [2019-10-13 18:06:04,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:01" (2/3) ... [2019-10-13 18:06:04,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587d51c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:04, skipping insertion in model container [2019-10-13 18:06:04,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:04" (3/3) ... [2019-10-13 18:06:04,353 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-10-13 18:06:04,363 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:04,373 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:04,385 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:04,417 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:04,417 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:04,417 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:04,417 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:04,417 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:04,418 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:04,418 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:04,418 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:06:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 18:06:04,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:04,460 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] [2019-10-13 18:06:04,461 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -241070563, now seen corresponding path program 1 times [2019-10-13 18:06:04,477 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:04,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520006611] [2019-10-13 18:06:04,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:04,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:04,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:04,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520006611] [2019-10-13 18:06:04,882 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:04,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:04,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333777015] [2019-10-13 18:06:04,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:04,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:04,906 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:10,205 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:06:10,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:10,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-10-13 18:06:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:10,239 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:10,239 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:10,252 INFO L600 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 [2019-10-13 18:06:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-13 18:06:10,389 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 70 [2019-10-13 18:06:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:10,389 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-13 18:06:10,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-13 18:06:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 18:06:10,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:10,400 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:10,400 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1544489621, now seen corresponding path program 1 times [2019-10-13 18:06:10,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:10,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859303127] [2019-10-13 18:06:10,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:10,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859303127] [2019-10-13 18:06:10,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:10,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:06:10,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981531643] [2019-10-13 18:06:10,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:06:10,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:06:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:10,795 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-13 18:06:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:15,126 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-10-13 18:06:15,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:15,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 153 [2019-10-13 18:06:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:15,153 INFO L225 Difference]: With dead ends: 3118 [2019-10-13 18:06:15,153 INFO L226 Difference]: Without dead ends: 2093 [2019-10-13 18:06:15,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:06:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-10-13 18:06:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-10-13 18:06:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-10-13 18:06:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-10-13 18:06:15,293 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 153 [2019-10-13 18:06:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:15,296 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-10-13 18:06:15,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:06:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-10-13 18:06:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 18:06:15,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:15,312 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:15,312 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash -258818048, now seen corresponding path program 1 times [2019-10-13 18:06:15,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:15,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191023346] [2019-10-13 18:06:15,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:15,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:15,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:06:15,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191023346] [2019-10-13 18:06:15,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202634450] [2019-10-13 18:06:15,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:15,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:15,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:15,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:06:15,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005264638] [2019-10-13 18:06:15,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:06:15,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:06:15,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:06:15,828 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-10-13 18:06:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:17,461 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-10-13 18:06:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:06:17,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-10-13 18:06:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:17,480 INFO L225 Difference]: With dead ends: 3102 [2019-10-13 18:06:17,481 INFO L226 Difference]: Without dead ends: 3100 [2019-10-13 18:06:17,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:06:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-10-13 18:06:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-10-13 18:06:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-10-13 18:06:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-10-13 18:06:17,573 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 170 [2019-10-13 18:06:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:17,574 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-10-13 18:06:17,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:06:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-10-13 18:06:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-13 18:06:17,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:17,584 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:17,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:17,788 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash -61464174, now seen corresponding path program 1 times [2019-10-13 18:06:17,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:17,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140584065] [2019-10-13 18:06:17,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:17,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:17,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:06:18,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140584065] [2019-10-13 18:06:18,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606430269] [2019-10-13 18:06:18,408 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 [2019-10-13 18:06:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:18,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:18,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:18,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:06:18,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24266996] [2019-10-13 18:06:18,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:06:18,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:06:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:18,672 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-10-13 18:06:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:25,338 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-10-13 18:06:25,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:06:25,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-10-13 18:06:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:25,369 INFO L225 Difference]: With dead ends: 7991 [2019-10-13 18:06:25,369 INFO L226 Difference]: Without dead ends: 5242 [2019-10-13 18:06:25,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:06:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-10-13 18:06:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-10-13 18:06:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-10-13 18:06:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-10-13 18:06:25,515 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 285 [2019-10-13 18:06:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:25,516 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-10-13 18:06:25,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:06:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-10-13 18:06:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2019-10-13 18:06:25,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:25,537 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:25,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:25,745 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash 566728298, now seen corresponding path program 1 times [2019-10-13 18:06:25,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:25,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521702057] [2019-10-13 18:06:25,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:25,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:25,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 583 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-10-13 18:06:26,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521702057] [2019-10-13 18:06:26,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53865325] [2019-10-13 18:06:26,840 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 [2019-10-13 18:06:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:27,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:27,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 586 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-10-13 18:06:27,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:27,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:27,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030982243] [2019-10-13 18:06:27,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:27,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:27,296 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-10-13 18:06:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:33,062 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-10-13 18:06:33,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 18:06:33,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 639 [2019-10-13 18:06:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:33,091 INFO L225 Difference]: With dead ends: 10080 [2019-10-13 18:06:33,092 INFO L226 Difference]: Without dead ends: 5576 [2019-10-13 18:06:33,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:06:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-10-13 18:06:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-10-13 18:06:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-10-13 18:06:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-10-13 18:06:33,231 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 639 [2019-10-13 18:06:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:33,233 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-10-13 18:06:33,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-10-13 18:06:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2019-10-13 18:06:33,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:33,254 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:33,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:33,460 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash -64568860, now seen corresponding path program 1 times [2019-10-13 18:06:33,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:33,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070995417] [2019-10-13 18:06:33,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:33,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:33,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 319 proven. 20 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2019-10-13 18:06:34,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070995417] [2019-10-13 18:06:34,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651434023] [2019-10-13 18:06:34,285 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 [2019-10-13 18:06:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:34,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-10-13 18:06:34,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:34,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:06:34,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831561596] [2019-10-13 18:06:34,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:06:34,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:06:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:34,706 INFO L87 Difference]: Start difference. First operand 5560 states and 6810 transitions. Second operand 3 states. [2019-10-13 18:06:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:36,378 INFO L93 Difference]: Finished difference Result 14525 states and 17996 transitions. [2019-10-13 18:06:36,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:06:36,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 646 [2019-10-13 18:06:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:36,410 INFO L225 Difference]: With dead ends: 14525 [2019-10-13 18:06:36,411 INFO L226 Difference]: Without dead ends: 7227 [2019-10-13 18:06:36,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 656 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states.