/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:06:50,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:06:50,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:06:50,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:06:50,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:06:50,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:06:50,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:06:50,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:06:50,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:06:50,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:06:50,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:06:50,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:06:50,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:06:50,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:06:50,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:06:50,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:06:50,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:06:50,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:06:50,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:06:50,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:06:50,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:06:50,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:06:50,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:06:50,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:06:50,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:06:50,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:06:50,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:06:50,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:06:50,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:06:50,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:06:50,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:06:50,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:06:50,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:06:50,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:06:50,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:06:50,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:06:50,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:06:50,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:06:50,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:06:50,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:06:50,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:06:50,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:06:50,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:06:50,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:06:50,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:06:50,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:06:50,617 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:06:50,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:06:50,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:06:50,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:06:50,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:06:50,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:06:50,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:06:50,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:06:50,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:06:50,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:06:50,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:06:50,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:06:50,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:06:50,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:06:50,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:06:50,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:06:50,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:06:50,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:06:50,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:06:50,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:06:50,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:06:50,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:06:50,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:06:50,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:06:50,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:06:50,950 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:06:50,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label37.c [2020-10-13 10:06:51,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3bcba2c/f1198beca1404a7e98651a5ac1fb2d81/FLAG3315a482e [2020-10-13 10:06:52,009 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:06:52,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label37.c [2020-10-13 10:06:52,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3bcba2c/f1198beca1404a7e98651a5ac1fb2d81/FLAG3315a482e [2020-10-13 10:06:52,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3bcba2c/f1198beca1404a7e98651a5ac1fb2d81 [2020-10-13 10:06:52,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:06:52,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:06:52,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:06:52,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:06:52,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:06:52,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:06:52" (1/1) ... [2020-10-13 10:06:52,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb2e3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:52, skipping insertion in model container [2020-10-13 10:06:52,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:06:52" (1/1) ... [2020-10-13 10:06:52,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:06:52,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:06:55,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:06:55,147 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:06:56,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:06:56,132 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:06:56,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56 WrapperNode [2020-10-13 10:06:56,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:06:56,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:06:56,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:06:56,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:06:56,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... [2020-10-13 10:06:56,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:06:56,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:06:56,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:06:56,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:06:56,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-13 10:06:56,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:06:56,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:06:56,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:06:56,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:06:56,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:06:56,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:06:56,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:06:56,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:06:56,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:06:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:06:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:06:56,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:06:56,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:06:56,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:06:56,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:06:56,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:06:56,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:06:56,653 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:06:56,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:06:56,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:06:56,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:07:09,079 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:07:09,080 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:07:09,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:07:09 BoogieIcfgContainer [2020-10-13 10:07:09,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:07:09,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:07:09,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:07:09,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:07:09,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:06:52" (1/3) ... [2020-10-13 10:07:09,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369aa01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:07:09, skipping insertion in model container [2020-10-13 10:07:09,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:56" (2/3) ... [2020-10-13 10:07:09,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369aa01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:07:09, skipping insertion in model container [2020-10-13 10:07:09,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:07:09" (3/3) ... [2020-10-13 10:07:09,111 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label37.c [2020-10-13 10:07:09,122 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:07:09,134 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:07:09,147 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:07:09,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:07:09,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:07:09,178 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:07:09,178 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:07:09,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:07:09,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:07:09,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:07:09,179 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:07:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:07:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:07:09,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:07:09,233 INFO L422 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] [2020-10-13 10:07:09,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:07:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:07:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1414077658, now seen corresponding path program 1 times [2020-10-13 10:07:09,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:07:09,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27756849] [2020-10-13 10:07:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:07:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:09,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:09,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:07:09,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-13 10:07:09,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:07:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:07:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:07:09,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:07:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:07:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:09,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:09,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:07:09,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:07:09,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:09,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:09,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:09,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:07:09,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27756849] [2020-10-13 10:07:09,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:07:09,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:07:09,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930838521] [2020-10-13 10:07:10,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:07:10,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:07:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:07:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:07:10,019 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:07:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:07:33,992 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-13 10:07:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:07:33,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-13 10:07:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:07:34,044 INFO L225 Difference]: With dead ends: 5031 [2020-10-13 10:07:34,045 INFO L226 Difference]: Without dead ends: 3190 [2020-10-13 10:07:34,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:07:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-13 10:07:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-13 10:07:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-13 10:07:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-13 10:07:34,242 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 44 [2020-10-13 10:07:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:07:34,242 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-13 10:07:34,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:07:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-13 10:07:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 10:07:34,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:07:34,249 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:07:34,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:07:34,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:07:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:07:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 563830556, now seen corresponding path program 1 times [2020-10-13 10:07:34,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:07:34,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410062452] [2020-10-13 10:07:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:07:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:34,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:36,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:36,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:36,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:36,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:07:36,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:07:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-13 10:07:36,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:07:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:36,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 10:07:36,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:07:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:36,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:36,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:07:36,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:36,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:07:36,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:07:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:07:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:07:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:37,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:37,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:07:37,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:37,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:07:37,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:07:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:07:37,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410062452] [2020-10-13 10:07:37,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:07:37,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:07:37,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235453836] [2020-10-13 10:07:37,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:07:37,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:07:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:07:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:07:37,136 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-13 10:08:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:08:08,943 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-13 10:08:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:08:08,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-13 10:08:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:08:08,986 INFO L225 Difference]: With dead ends: 9218 [2020-10-13 10:08:08,987 INFO L226 Difference]: Without dead ends: 6040 [2020-10-13 10:08:08,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:08:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-13 10:08:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-13 10:08:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:08:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8357 transitions. [2020-10-13 10:08:09,180 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8357 transitions. Word has length 117 [2020-10-13 10:08:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:08:09,183 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8357 transitions. [2020-10-13 10:08:09,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:08:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8357 transitions. [2020-10-13 10:08:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 10:08:09,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:09,196 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:08:09,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:08:09,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:09,197 INFO L82 PathProgramCache]: Analyzing trace with hash -333562722, now seen corresponding path program 1 times [2020-10-13 10:08:09,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:09,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804983157] [2020-10-13 10:08:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:09,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:09,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:10,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:10,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:08:10,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:08:10,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-13 10:08:10,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:10,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:08:10,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:08:10,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:08:10,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:11,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:11,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:11,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:11,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:11,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:08:11,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:08:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:08:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:08:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:08:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:11,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:11,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:08:11,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:11,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 10:08:11,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:11,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:08:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:11,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804983157] [2020-10-13 10:08:11,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:08:11,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:08:11,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572220862] [2020-10-13 10:08:11,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:08:11,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:08:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:11,218 INFO L87 Difference]: Start difference. First operand 6024 states and 8357 transitions. Second operand 5 states. [2020-10-13 10:08:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:08:50,923 INFO L93 Difference]: Finished difference Result 14872 states and 21399 transitions. [2020-10-13 10:08:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:08:50,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-13 10:08:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:08:50,969 INFO L225 Difference]: With dead ends: 14872 [2020-10-13 10:08:50,969 INFO L226 Difference]: Without dead ends: 8854 [2020-10-13 10:08:50,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:08:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2020-10-13 10:08:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8845. [2020-10-13 10:08:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8845 states. [2020-10-13 10:08:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 11621 transitions. [2020-10-13 10:08:51,211 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 11621 transitions. Word has length 117 [2020-10-13 10:08:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:08:51,217 INFO L479 AbstractCegarLoop]: Abstraction has 8845 states and 11621 transitions. [2020-10-13 10:08:51,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:08:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 11621 transitions. [2020-10-13 10:08:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 10:08:51,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:51,227 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:08:51,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:08:51,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -912859195, now seen corresponding path program 1 times [2020-10-13 10:08:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:51,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844744155] [2020-10-13 10:08:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:51,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:51,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:08:51,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:08:51,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-13 10:08:51,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:08:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:08:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:08:51,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:51,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:51,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:51,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:51,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:08:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:08:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:08:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:51,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:08:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:52,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:52,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:08:52,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 10:08:52,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:08:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:52,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844744155] [2020-10-13 10:08:52,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:08:52,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:08:52,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038480682] [2020-10-13 10:08:52,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:08:52,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:08:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:52,127 INFO L87 Difference]: Start difference. First operand 8845 states and 11621 transitions. Second operand 5 states. [2020-10-13 10:09:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:09:49,454 INFO L93 Difference]: Finished difference Result 26193 states and 34875 transitions. [2020-10-13 10:09:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:09:49,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-13 10:09:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:09:49,529 INFO L225 Difference]: With dead ends: 26193 [2020-10-13 10:09:49,530 INFO L226 Difference]: Without dead ends: 17354 [2020-10-13 10:09:49,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:09:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17354 states. [2020-10-13 10:09:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17354 to 17305. [2020-10-13 10:09:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17305 states. [2020-10-13 10:09:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17305 states to 17305 states and 21484 transitions. [2020-10-13 10:09:50,007 INFO L78 Accepts]: Start accepts. Automaton has 17305 states and 21484 transitions. Word has length 125 [2020-10-13 10:09:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:09:50,011 INFO L479 AbstractCegarLoop]: Abstraction has 17305 states and 21484 transitions. [2020-10-13 10:09:50,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:09:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 17305 states and 21484 transitions. [2020-10-13 10:09:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 10:09:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:50,017 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:09:50,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:09:50,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 401632303, now seen corresponding path program 1 times [2020-10-13 10:09:50,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:50,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117564468] [2020-10-13 10:09:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:50,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:51,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:51,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:09:51,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:09:51,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1596 [2020-10-13 10:09:51,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:09:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:09:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:09:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:09:51,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:51,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:51,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:51,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:09:51,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:09:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:09:51,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:09:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:52,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:52,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:09:52,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:52,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 10:09:52,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:52,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:09:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:09:52,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117564468] [2020-10-13 10:09:52,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:09:52,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:09:52,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719831080] [2020-10-13 10:09:52,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:09:52,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:09:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:09:52,331 INFO L87 Difference]: Start difference. First operand 17305 states and 21484 transitions. Second operand 5 states. [2020-10-13 10:10:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:49,757 INFO L93 Difference]: Finished difference Result 34626 states and 43013 transitions. [2020-10-13 10:10:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:49,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-13 10:10:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:49,837 INFO L225 Difference]: With dead ends: 34626 [2020-10-13 10:10:49,837 INFO L226 Difference]: Without dead ends: 17309 [2020-10-13 10:10:49,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:10:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17309 states. [2020-10-13 10:10:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17309 to 17305. [2020-10-13 10:10:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17305 states. [2020-10-13 10:10:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17305 states to 17305 states and 21480 transitions. [2020-10-13 10:10:50,196 INFO L78 Accepts]: Start accepts. Automaton has 17305 states and 21480 transitions. Word has length 145 [2020-10-13 10:10:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:50,197 INFO L479 AbstractCegarLoop]: Abstraction has 17305 states and 21480 transitions. [2020-10-13 10:10:50,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17305 states and 21480 transitions. [2020-10-13 10:10:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 10:10:50,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:50,202 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:10:50,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:10:50,203 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash 732430375, now seen corresponding path program 1 times [2020-10-13 10:10:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:50,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502270639] [2020-10-13 10:10:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:50,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:50,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:51,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:51,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 10:10:51,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:10:51,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-13 10:10:51,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:51,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-13 10:10:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:10:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:51,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:51,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:51,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:51,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:10:51,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:51,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:51,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:51,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:51,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:51,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:51,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:10:51,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:51,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 10:10:51,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 10:10:51,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:51,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502270639] [2020-10-13 10:10:51,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:51,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:10:51,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325413971] [2020-10-13 10:10:51,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:10:51,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:10:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:10:51,878 INFO L87 Difference]: Start difference. First operand 17305 states and 21480 transitions. Second operand 6 states.