java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:48,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:48,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:48,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:48,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:48,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:48,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:48,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:48,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:48,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:48,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:48,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:48,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:48,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:48,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:48,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:48,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:48,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:48,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:48,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:48,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:48,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:48,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:48,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:48,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:48,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:48,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:48,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:48,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:48,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:48,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:48,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:48,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:48,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:48,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:48,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:48,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:48,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:48,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:48,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:48,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:48,936 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:48,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:48,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:48,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:48,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:48,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:48,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:48,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:48,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:48,938 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:48,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:48,938 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:48,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:48,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:48,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:48,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:48,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:48,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:48,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:48,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:48,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:48,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:48,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:48,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:48,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:49,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:49,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:49,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:49,296 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:49,296 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:49,297 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-10-14 21:54:49,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832dcd65f/c39dae95c6904f5b96b3a48c33b0d635/FLAG6408c5770 [2019-10-14 21:54:50,006 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:50,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-10-14 21:54:50,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832dcd65f/c39dae95c6904f5b96b3a48c33b0d635/FLAG6408c5770 [2019-10-14 21:54:50,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832dcd65f/c39dae95c6904f5b96b3a48c33b0d635 [2019-10-14 21:54:50,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:50,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:50,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:50,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:50,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:50,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:50" (1/1) ... [2019-10-14 21:54:50,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@931e348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:50, skipping insertion in model container [2019-10-14 21:54:50,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:50" (1/1) ... [2019-10-14 21:54:50,200 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:50,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:51,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:51,088 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:51,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:51,375 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:51,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51 WrapperNode [2019-10-14 21:54:51,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:51,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:51,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:51,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:51,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... [2019-10-14 21:54:51,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:51,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:51,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:51,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:51,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:51,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:53,570 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:53,571 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:53,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:53 BoogieIcfgContainer [2019-10-14 21:54:53,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:53,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:53,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:53,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:53,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:50" (1/3) ... [2019-10-14 21:54:53,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa4871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:53, skipping insertion in model container [2019-10-14 21:54:53,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:51" (2/3) ... [2019-10-14 21:54:53,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa4871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:53, skipping insertion in model container [2019-10-14 21:54:53,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:53" (3/3) ... [2019-10-14 21:54:53,581 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2019-10-14 21:54:53,591 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:53,600 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:53,612 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:53,651 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:53,652 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:53,652 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:53,652 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:53,652 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:53,653 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:53,653 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:53,653 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 21:54:53,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:53,735 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:53,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:53,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1898680923, now seen corresponding path program 1 times [2019-10-14 21:54:53,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:53,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25547173] [2019-10-14 21:54:53,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,805 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:54,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25547173] [2019-10-14 21:54:54,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:54,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:54,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499997489] [2019-10-14 21:54:54,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:54,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:54,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:54,989 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:55,218 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:55,536 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:54:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:59,676 INFO L93 Difference]: Finished difference Result 1082 states and 1940 transitions. [2019-10-14 21:54:59,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:59,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2019-10-14 21:54:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:59,716 INFO L225 Difference]: With dead ends: 1082 [2019-10-14 21:54:59,716 INFO L226 Difference]: Without dead ends: 687 [2019-10-14 21:54:59,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-14 21:54:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 462. [2019-10-14 21:54:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-14 21:54:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 756 transitions. [2019-10-14 21:54:59,875 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 756 transitions. Word has length 190 [2019-10-14 21:54:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:59,878 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 756 transitions. [2019-10-14 21:54:59,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 756 transitions. [2019-10-14 21:54:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-14 21:54:59,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:59,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:59,884 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1068911710, now seen corresponding path program 1 times [2019-10-14 21:54:59,885 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:59,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065066084] [2019-10-14 21:54:59,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:00,192 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:00,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065066084] [2019-10-14 21:55:00,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:00,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:00,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460397491] [2019-10-14 21:55:00,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:00,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:00,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:00,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:00,459 INFO L87 Difference]: Start difference. First operand 462 states and 756 transitions. Second operand 9 states. [2019-10-14 21:55:00,628 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:01,040 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:04,138 INFO L93 Difference]: Finished difference Result 1370 states and 2282 transitions. [2019-10-14 21:55:04,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:55:04,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 217 [2019-10-14 21:55:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:04,153 INFO L225 Difference]: With dead ends: 1370 [2019-10-14 21:55:04,153 INFO L226 Difference]: Without dead ends: 914 [2019-10-14 21:55:04,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-10-14 21:55:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 893. [2019-10-14 21:55:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 893 states. [2019-10-14 21:55:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1312 transitions. [2019-10-14 21:55:04,217 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1312 transitions. Word has length 217 [2019-10-14 21:55:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:04,217 INFO L462 AbstractCegarLoop]: Abstraction has 893 states and 1312 transitions. [2019-10-14 21:55:04,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1312 transitions. [2019-10-14 21:55:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-14 21:55:04,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:04,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:04,224 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 880538771, now seen corresponding path program 1 times [2019-10-14 21:55:04,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:04,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665177961] [2019-10-14 21:55:04,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,575 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,711 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:05,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665177961] [2019-10-14 21:55:05,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043995599] [2019-10-14 21:55:05,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:05,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:05,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:05,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:05,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:55:05,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206782456] [2019-10-14 21:55:05,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:05,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:05,549 INFO L87 Difference]: Start difference. First operand 893 states and 1312 transitions. Second operand 3 states. [2019-10-14 21:55:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:06,702 INFO L93 Difference]: Finished difference Result 2644 states and 3957 transitions. [2019-10-14 21:55:06,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:06,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2019-10-14 21:55:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:06,717 INFO L225 Difference]: With dead ends: 2644 [2019-10-14 21:55:06,717 INFO L226 Difference]: Without dead ends: 1757 [2019-10-14 21:55:06,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2019-10-14 21:55:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1743. [2019-10-14 21:55:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1743 states. [2019-10-14 21:55:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2549 transitions. [2019-10-14 21:55:06,835 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2549 transitions. Word has length 235 [2019-10-14 21:55:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:06,836 INFO L462 AbstractCegarLoop]: Abstraction has 1743 states and 2549 transitions. [2019-10-14 21:55:06,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2549 transitions. [2019-10-14 21:55:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-14 21:55:06,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:06,847 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:07,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:07,052 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1518602962, now seen corresponding path program 1 times [2019-10-14 21:55:07,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:07,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039407522] [2019-10-14 21:55:07,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,368 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,510 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 52 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:07,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039407522] [2019-10-14 21:55:07,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198929859] [2019-10-14 21:55:07,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:07,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:55:08,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:08,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:55:08,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304897479] [2019-10-14 21:55:08,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:08,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:08,049 INFO L87 Difference]: Start difference. First operand 1743 states and 2549 transitions. Second operand 5 states. [2019-10-14 21:55:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:09,429 INFO L93 Difference]: Finished difference Result 4376 states and 6480 transitions. [2019-10-14 21:55:09,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:09,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2019-10-14 21:55:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:09,451 INFO L225 Difference]: With dead ends: 4376 [2019-10-14 21:55:09,451 INFO L226 Difference]: Without dead ends: 2639 [2019-10-14 21:55:09,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2019-10-14 21:55:09,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2597. [2019-10-14 21:55:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2019-10-14 21:55:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3553 transitions. [2019-10-14 21:55:09,579 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3553 transitions. Word has length 250 [2019-10-14 21:55:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:09,580 INFO L462 AbstractCegarLoop]: Abstraction has 2597 states and 3553 transitions. [2019-10-14 21:55:09,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3553 transitions. [2019-10-14 21:55:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-14 21:55:09,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:09,591 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:09,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:09,805 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1763415962, now seen corresponding path program 1 times [2019-10-14 21:55:09,806 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:09,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111010838] [2019-10-14 21:55:09,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:09,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:09,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,026 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 74 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:55:10,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111010838] [2019-10-14 21:55:10,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231173677] [2019-10-14 21:55:10,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:10,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:55:10,830 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:10,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:55:10,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558124621] [2019-10-14 21:55:10,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:55:10,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:55:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:10,833 INFO L87 Difference]: Start difference. First operand 2597 states and 3553 transitions. Second operand 11 states. [2019-10-14 21:55:11,005 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:55:11,316 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:12,219 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:14,768 INFO L93 Difference]: Finished difference Result 6536 states and 9220 transitions. [2019-10-14 21:55:14,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:55:14,771 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 262 [2019-10-14 21:55:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:14,798 INFO L225 Difference]: With dead ends: 6536 [2019-10-14 21:55:14,799 INFO L226 Difference]: Without dead ends: 3945 [2019-10-14 21:55:14,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:55:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2019-10-14 21:55:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3881. [2019-10-14 21:55:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3881 states. [2019-10-14 21:55:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 5072 transitions. [2019-10-14 21:55:14,978 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 5072 transitions. Word has length 262 [2019-10-14 21:55:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:14,979 INFO L462 AbstractCegarLoop]: Abstraction has 3881 states and 5072 transitions. [2019-10-14 21:55:14,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:55:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 5072 transitions. [2019-10-14 21:55:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-14 21:55:14,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:14,995 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:15,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:15,201 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -597819644, now seen corresponding path program 1 times [2019-10-14 21:55:15,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:15,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144943328] [2019-10-14 21:55:15,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:15,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:15,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,424 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:15,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144943328] [2019-10-14 21:55:15,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409972673] [2019-10-14 21:55:15,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:55:16,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:16,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:16,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-14 21:55:16,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991715058] [2019-10-14 21:55:16,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:16,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:16,084 INFO L87 Difference]: Start difference. First operand 3881 states and 5072 transitions. Second operand 9 states. [2019-10-14 21:55:16,385 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:16,862 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:21,454 INFO L93 Difference]: Finished difference Result 14435 states and 21084 transitions. [2019-10-14 21:55:21,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:55:21,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 273 [2019-10-14 21:55:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:21,522 INFO L225 Difference]: With dead ends: 14435 [2019-10-14 21:55:21,522 INFO L226 Difference]: Without dead ends: 10560 [2019-10-14 21:55:21,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2019-10-14 21:55:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 9932. [2019-10-14 21:55:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2019-10-14 21:55:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 13165 transitions. [2019-10-14 21:55:21,915 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 13165 transitions. Word has length 273 [2019-10-14 21:55:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:21,916 INFO L462 AbstractCegarLoop]: Abstraction has 9932 states and 13165 transitions. [2019-10-14 21:55:21,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 13165 transitions. [2019-10-14 21:55:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-14 21:55:21,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:21,951 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:22,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:22,158 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:22,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1413938940, now seen corresponding path program 1 times [2019-10-14 21:55:22,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:22,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584644139] [2019-10-14 21:55:22,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,393 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:22,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584644139] [2019-10-14 21:55:22,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816150057] [2019-10-14 21:55:22,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:55:22,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:22,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:55:22,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:55:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:55:23,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:23,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-10-14 21:55:23,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957456623] [2019-10-14 21:55:23,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:55:23,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:55:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:55:23,064 INFO L87 Difference]: Start difference. First operand 9932 states and 13165 transitions. Second operand 6 states. [2019-10-14 21:55:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:24,704 INFO L93 Difference]: Finished difference Result 17254 states and 23935 transitions. [2019-10-14 21:55:24,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:55:24,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 303 [2019-10-14 21:55:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:24,807 INFO L225 Difference]: With dead ends: 17254 [2019-10-14 21:55:24,807 INFO L226 Difference]: Without dead ends: 10131 [2019-10-14 21:55:24,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:55:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10131 states.