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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:05:04,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:05:04,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:05:04,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:05:04,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:05:04,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:05:04,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:05:04,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:05:04,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:05:04,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:05:04,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:05:04,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:05:04,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:05:04,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:05:04,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:05:04,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:05:04,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:05:04,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:05:04,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:05:04,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:05:04,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:05:04,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:05:04,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:05:04,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:05:04,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 22:05:04,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 22:05:04,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 22:05:04,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 22:05:04,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 22:05:04,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 22:05:04,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:05:04,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:05:04,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:05:04,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:05:04,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:05:04,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:05:04,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:05:04,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:05:04,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:05:04,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:05:04,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:05:04,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:05:04,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:05:04,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:05:04,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:05:04,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:05:04,609 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:05:04,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:05:04,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:05:04,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:05:04,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:05:04,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:05:04,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:05:04,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:05:04,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:05:04,612 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:05:04,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:05:04,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:05:04,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:05:04,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:05:04,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:05:04,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:05:04,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:05:04,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:04,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:05:04,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:05:04,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:05:04,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:05:04,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:05:04,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:05:04,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:05:04,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:05:04,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:05:04,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:05:04,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:05:04,927 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:05:04,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-14 22:05:05,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798c12ba5/c6dd07017349485991da0c30bf00cbf5/FLAG8caa4d94c [2019-10-14 22:05:05,737 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:05:05,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-14 22:05:05,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798c12ba5/c6dd07017349485991da0c30bf00cbf5/FLAG8caa4d94c [2019-10-14 22:05:05,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798c12ba5/c6dd07017349485991da0c30bf00cbf5 [2019-10-14 22:05:05,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:05:05,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:05:05,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:05,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:05:05,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:05:05,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:05" (1/1) ... [2019-10-14 22:05:05,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:05, skipping insertion in model container [2019-10-14 22:05:05,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:05" (1/1) ... [2019-10-14 22:05:05,879 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:05:05,970 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:06,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:06,795 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:07,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:07,174 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:07,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07 WrapperNode [2019-10-14 22:05:07,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:07,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:07,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:07,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:07,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:07,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:07,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:07,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:07,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:07,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:07,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:07,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:07,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:07,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:07,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:07,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:07,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:09,853 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:09,854 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:09,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:09 BoogieIcfgContainer [2019-10-14 22:05:09,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:09,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:09,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:09,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:09,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:05" (1/3) ... [2019-10-14 22:05:09,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:09, skipping insertion in model container [2019-10-14 22:05:09,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07" (2/3) ... [2019-10-14 22:05:09,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:09, skipping insertion in model container [2019-10-14 22:05:09,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:09" (3/3) ... [2019-10-14 22:05:09,881 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-10-14 22:05:09,894 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:09,907 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:09,920 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:09,967 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:09,968 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:09,968 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:09,968 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:09,968 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:09,968 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:09,969 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:09,969 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:05:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 22:05:10,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:10,021 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] [2019-10-14 22:05:10,023 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:10,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-10-14 22:05:10,038 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:10,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650076216] [2019-10-14 22:05:10,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:10,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:10,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:10,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650076216] [2019-10-14 22:05:10,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:10,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:10,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341931172] [2019-10-14 22:05:10,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:10,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:10,561 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:05:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:16,373 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:05:16,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:05:16,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-14 22:05:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:16,402 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:05:16,403 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:05:16,413 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 [2019-10-14 22:05:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:05:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:05:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:05:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-14 22:05:16,544 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 63 [2019-10-14 22:05:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:16,546 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-14 22:05:16,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-14 22:05:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 22:05:16,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:16,569 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, 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] [2019-10-14 22:05:16,570 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1694919497, now seen corresponding path program 1 times [2019-10-14 22:05:16,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:16,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921513714] [2019-10-14 22:05:16,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:16,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:16,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:05:17,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921513714] [2019-10-14 22:05:17,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589551203] [2019-10-14 22:05:17,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:17,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:05:17,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:17,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:05:17,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208987082] [2019-10-14 22:05:17,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:17,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:17,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:17,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:17,284 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-14 22:05:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:20,599 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-10-14 22:05:20,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:05:20,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-10-14 22:05:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:20,622 INFO L225 Difference]: With dead ends: 3131 [2019-10-14 22:05:20,622 INFO L226 Difference]: Without dead ends: 2106 [2019-10-14 22:05:20,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-14 22:05:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-10-14 22:05:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-14 22:05:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-14 22:05:20,802 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 230 [2019-10-14 22:05:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:20,806 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-14 22:05:20,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-14 22:05:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 22:05:20,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:20,819 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, 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] [2019-10-14 22:05:21,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:21,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash 142778751, now seen corresponding path program 1 times [2019-10-14 22:05:21,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:21,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854242577] [2019-10-14 22:05:21,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:21,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:21,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:05:21,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854242577] [2019-10-14 22:05:21,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209864910] [2019-10-14 22:05:21,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:21,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:21,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:05:21,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:21,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:21,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453836029] [2019-10-14 22:05:21,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:21,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:21,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:21,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:21,554 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-14 22:05:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:24,154 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-14 22:05:24,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:05:24,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-14 22:05:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:24,185 INFO L225 Difference]: With dead ends: 6302 [2019-10-14 22:05:24,185 INFO L226 Difference]: Without dead ends: 4230 [2019-10-14 22:05:24,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:05:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-14 22:05:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-14 22:05:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-14 22:05:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-10-14 22:05:24,309 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 234 [2019-10-14 22:05:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:24,310 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-10-14 22:05:24,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-10-14 22:05:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-14 22:05:24,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:24,319 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:24,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:24,523 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash 654408271, now seen corresponding path program 1 times [2019-10-14 22:05:24,524 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:24,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239318433] [2019-10-14 22:05:24,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:24,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:24,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 249 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:05:25,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239318433] [2019-10-14 22:05:25,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17181285] [2019-10-14 22:05:25,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:25,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:05:25,323 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:25,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:05:25,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83674345] [2019-10-14 22:05:25,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:25,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:25,327 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-10-14 22:05:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:29,986 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-10-14 22:05:29,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:29,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 338 [2019-10-14 22:05:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:30,021 INFO L225 Difference]: With dead ends: 10864 [2019-10-14 22:05:30,022 INFO L226 Difference]: Without dead ends: 6662 [2019-10-14 22:05:30,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-14 22:05:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-10-14 22:05:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-10-14 22:05:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-10-14 22:05:30,197 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 338 [2019-10-14 22:05:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:30,199 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-10-14 22:05:30,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-10-14 22:05:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2019-10-14 22:05:30,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:30,215 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:30,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:30,419 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1714892967, now seen corresponding path program 1 times [2019-10-14 22:05:30,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:30,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144945764] [2019-10-14 22:05:30,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:30,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:30,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 168 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-14 22:05:30,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144945764] [2019-10-14 22:05:30,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163654645] [2019-10-14 22:05:30,973 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 22:05:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:31,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:31,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-10-14 22:05:31,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:31,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:31,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207987263] [2019-10-14 22:05:31,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:31,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:31,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:31,335 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-10-14 22:05:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:33,883 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-10-14 22:05:33,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:05:33,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2019-10-14 22:05:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:33,910 INFO L225 Difference]: With dead ends: 11257 [2019-10-14 22:05:33,910 INFO L226 Difference]: Without dead ends: 6333 [2019-10-14 22:05:33,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-10-14 22:05:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-10-14 22:05:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-10-14 22:05:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-10-14 22:05:34,073 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 414 [2019-10-14 22:05:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:34,081 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-10-14 22:05:34,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-10-14 22:05:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2019-10-14 22:05:34,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:34,098 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:34,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:34,302 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 187773675, now seen corresponding path program 1 times [2019-10-14 22:05:34,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:34,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114272657] [2019-10-14 22:05:34,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:34,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:34,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 284 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 22:05:35,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114272657] [2019-10-14 22:05:35,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564264244] [2019-10-14 22:05:35,242 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 22:05:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:35,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:35,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 426 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:05:35,650 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:35,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:35,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583647082] [2019-10-14 22:05:35,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:35,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:35,655 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states.