/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/Problem13_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:33:01,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:33:01,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:33:01,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:33:01,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:33:01,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:33:01,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:33:01,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:33:01,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:33:01,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:33:01,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:33:01,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:33:01,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:33:01,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:33:01,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:33:01,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:33:01,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:33:01,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:33:01,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:33:01,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:33:01,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:33:01,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:33:01,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:33:01,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:33:01,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:33:01,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:33:01,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:33:01,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:33:01,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:33:01,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:33:01,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:33:01,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:33:01,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:33:01,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:33:01,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:33:01,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:33:01,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:33:01,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:33:01,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:33:01,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:33:01,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:33:01,788 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 [2020-10-14 21:33:01,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:33:01,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:33:01,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:33:01,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:33:01,844 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:33:01,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:33:01,845 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:33:01,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:33:01,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:33:01,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:33:01,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:33:01,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:33:01,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:33:01,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:33:01,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:33:01,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:33:01,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:33:01,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:33:01,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:33:01,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:33:01,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:33:01,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:33:01,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:33:01,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:33:01,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:33:01,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:33:01,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:33:01,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:33:01,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:33:01,852 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 21:33:02,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:33:02,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:33:02,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:33:02,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:33:02,277 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:33:02,279 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label41.c [2020-10-14 21:33:02,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fa323df/b28fa08f13454b77a63becf275648b9e/FLAG7d27deb43 [2020-10-14 21:33:03,429 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:33:03,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label41.c [2020-10-14 21:33:03,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fa323df/b28fa08f13454b77a63becf275648b9e/FLAG7d27deb43 [2020-10-14 21:33:03,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fa323df/b28fa08f13454b77a63becf275648b9e [2020-10-14 21:33:03,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:33:03,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:33:03,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:33:03,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:33:03,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:33:03,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:33:03" (1/1) ... [2020-10-14 21:33:03,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:03, skipping insertion in model container [2020-10-14 21:33:03,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:33:03" (1/1) ... [2020-10-14 21:33:03,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:33:04,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:33:06,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:33:06,113 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:33:06,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:33:06,969 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:33:06,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06 WrapperNode [2020-10-14 21:33:06,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:33:06,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:33:06,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:33:06,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:33:06,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:06,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (1/1) ... [2020-10-14 21:33:07,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:33:07,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:33:07,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:33:07,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:33:07,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (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 [2020-10-14 21:33:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:33:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:33:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:33:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:33:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:33:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:33:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:33:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:33:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:33:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:33:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:33:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:33:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:33:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:33:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:33:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:33:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:33:20,529 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:33:20,529 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:33:20,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:33:20 BoogieIcfgContainer [2020-10-14 21:33:20,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:33:20,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:33:20,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:33:20,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:33:20,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:33:03" (1/3) ... [2020-10-14 21:33:20,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679bd14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:33:20, skipping insertion in model container [2020-10-14 21:33:20,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:33:06" (2/3) ... [2020-10-14 21:33:20,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679bd14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:33:20, skipping insertion in model container [2020-10-14 21:33:20,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:33:20" (3/3) ... [2020-10-14 21:33:20,577 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label41.c [2020-10-14 21:33:20,592 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:33:20,612 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:33:20,629 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:33:20,668 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:33:20,669 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:33:20,669 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:33:20,669 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:33:20,669 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:33:20,669 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:33:20,670 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:33:20,670 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:33:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:33:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 21:33:20,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:33:20,744 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, 1, 1, 1, 1, 1, 1] [2020-10-14 21:33:20,744 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:33:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:33:20,751 INFO L82 PathProgramCache]: Analyzing trace with hash 633410455, now seen corresponding path program 1 times [2020-10-14 21:33:20,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:33:20,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981495513] [2020-10-14 21:33:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:33:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:21,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:21,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:21,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 21:33:21,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:21,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-14 21:33:21,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:21,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:33:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:33:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 21:33:21,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 21:33:21,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:33:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:21,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:21,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:33:21,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:21,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 21:33:21,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:21,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:33:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:33:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:33:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:33:21,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981495513] [2020-10-14 21:33:21,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:33:21,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 21:33:21,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880733826] [2020-10-14 21:33:21,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 21:33:21,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:33:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 21:33:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:33:21,863 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 5 states. [2020-10-14 21:33:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:33:41,804 INFO L93 Difference]: Finished difference Result 4080 states and 7562 transitions. [2020-10-14 21:33:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 21:33:41,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-14 21:33:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:33:41,854 INFO L225 Difference]: With dead ends: 4080 [2020-10-14 21:33:41,854 INFO L226 Difference]: Without dead ends: 2872 [2020-10-14 21:33:41,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:33:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2020-10-14 21:33:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 1934. [2020-10-14 21:33:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1934 states. [2020-10-14 21:33:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3163 transitions. [2020-10-14 21:33:42,084 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3163 transitions. Word has length 50 [2020-10-14 21:33:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:33:42,085 INFO L479 AbstractCegarLoop]: Abstraction has 1934 states and 3163 transitions. [2020-10-14 21:33:42,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 21:33:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3163 transitions. [2020-10-14 21:33:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 21:33:42,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:33:42,092 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, 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] [2020-10-14 21:33:42,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:33:42,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:33:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:33:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 443103603, now seen corresponding path program 1 times [2020-10-14 21:33:42,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:33:42,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725891851] [2020-10-14 21:33:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:33:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:42,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:43,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:44,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:44,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 21:33:44,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:33:44,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-14 21:33:44,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:44,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:44,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:33:44,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:33:44,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:33:44,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:44,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:33:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:44,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:44,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:33:44,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 21:33:44,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:44,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:33:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:33:44,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:33:44,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:44,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:33:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:33:44,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:33:44,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:33:44,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:33:44,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:33:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-14 21:33:44,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:33:44,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:33:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:33:44,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:33:44,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:33:44,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:33:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:33:44,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725891851] [2020-10-14 21:33:44,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:33:44,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:33:44,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965581659] [2020-10-14 21:33:44,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:33:44,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:33:44,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:33:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:33:44,884 INFO L87 Difference]: Start difference. First operand 1934 states and 3163 transitions. Second operand 7 states. [2020-10-14 21:34:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:34:06,961 INFO L93 Difference]: Finished difference Result 5646 states and 9369 transitions. [2020-10-14 21:34:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:34:06,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-14 21:34:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:34:06,987 INFO L225 Difference]: With dead ends: 5646 [2020-10-14 21:34:06,988 INFO L226 Difference]: Without dead ends: 3718 [2020-10-14 21:34:06,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:34:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2020-10-14 21:34:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3606. [2020-10-14 21:34:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2020-10-14 21:34:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5132 transitions. [2020-10-14 21:34:07,120 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5132 transitions. Word has length 125 [2020-10-14 21:34:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:34:07,121 INFO L479 AbstractCegarLoop]: Abstraction has 3606 states and 5132 transitions. [2020-10-14 21:34:07,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:34:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5132 transitions. [2020-10-14 21:34:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 21:34:07,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:07,126 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, 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] [2020-10-14 21:34:07,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:34:07,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1016650103, now seen corresponding path program 1 times [2020-10-14 21:34:07,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:07,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97312362] [2020-10-14 21:34:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:07,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:08,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:08,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 21:34:08,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:34:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-14 21:34:08,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:08,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:34:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:34:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 21:34:08,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:08,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:08,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:08,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:08,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 21:34:08,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:08,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:34:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:08,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:34:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:08,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:08,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:08,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:34:08,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:08,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-14 21:34:08,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:08,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:34:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:34:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:34:08,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97312362] [2020-10-14 21:34:08,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:34:08,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:34:08,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966241245] [2020-10-14 21:34:08,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:34:08,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:34:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:34:08,786 INFO L87 Difference]: Start difference. First operand 3606 states and 5132 transitions. Second operand 7 states. [2020-10-14 21:34:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:34:27,562 INFO L93 Difference]: Finished difference Result 10716 states and 15511 transitions. [2020-10-14 21:34:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:34:27,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2020-10-14 21:34:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:34:27,604 INFO L225 Difference]: With dead ends: 10716 [2020-10-14 21:34:27,605 INFO L226 Difference]: Without dead ends: 7116 [2020-10-14 21:34:27,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:34:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-10-14 21:34:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 6986. [2020-10-14 21:34:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6986 states. [2020-10-14 21:34:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 9005 transitions. [2020-10-14 21:34:27,792 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 9005 transitions. Word has length 155 [2020-10-14 21:34:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:34:27,793 INFO L479 AbstractCegarLoop]: Abstraction has 6986 states and 9005 transitions. [2020-10-14 21:34:27,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:34:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 9005 transitions. [2020-10-14 21:34:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-14 21:34:27,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:27,797 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, 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] [2020-10-14 21:34:27,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:34:27,798 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1252480928, now seen corresponding path program 1 times [2020-10-14 21:34:27,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:27,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018019693] [2020-10-14 21:34:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:28,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:28,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 21:34:28,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:28,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-14 21:34:28,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:28,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-14 21:34:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 21:34:28,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:28,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:28,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:28,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:28,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:28,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 21:34:28,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:28,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:34:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:34:28,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:28,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:34:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:28,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:28,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:34:28,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:28,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 21:34:28,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:28,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:34:28,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:34:28,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018019693] [2020-10-14 21:34:28,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:34:28,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 21:34:28,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659971315] [2020-10-14 21:34:28,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 21:34:28,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:28,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 21:34:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:34:28,669 INFO L87 Difference]: Start difference. First operand 6986 states and 9005 transitions. Second operand 5 states. [2020-10-14 21:34:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:34:54,613 INFO L93 Difference]: Finished difference Result 14131 states and 19592 transitions. [2020-10-14 21:34:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:34:54,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-14 21:34:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:34:54,663 INFO L225 Difference]: With dead ends: 14131 [2020-10-14 21:34:54,664 INFO L226 Difference]: Without dead ends: 10425 [2020-10-14 21:34:54,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 21:34:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10425 states. [2020-10-14 21:34:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10425 to 10419. [2020-10-14 21:34:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10419 states. [2020-10-14 21:34:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 13046 transitions. [2020-10-14 21:34:55,033 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 13046 transitions. Word has length 179 [2020-10-14 21:34:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:34:55,034 INFO L479 AbstractCegarLoop]: Abstraction has 10419 states and 13046 transitions. [2020-10-14 21:34:55,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 21:34:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 13046 transitions. [2020-10-14 21:34:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-14 21:34:55,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:34:55,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:34:55,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:34:55,041 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:34:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:34:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash 472050431, now seen corresponding path program 1 times [2020-10-14 21:34:55,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:34:55,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829144259] [2020-10-14 21:34:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:34:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:55,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:58,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:58,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-14 21:34:58,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 21:34:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3641 [2020-10-14 21:34:58,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:58,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-14 21:34:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 21:34:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:34:58,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:34:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:58,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:58,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:58,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:34:58,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:58,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 21:34:58,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:58,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:34:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:34:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:58,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:34:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:59,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:59,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 21:34:59,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-14 21:34:59,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:59,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:59,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:34:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:34:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 21:34:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 21:34:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:34:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:34:59,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:34:59,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:34:59,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:34:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-14 21:34:59,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:34:59,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:34:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:34:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:34:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:34:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:34:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 21:34:59,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829144259] [2020-10-14 21:34:59,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:34:59,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:34:59,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726054401] [2020-10-14 21:34:59,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:34:59,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:34:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:34:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:34:59,476 INFO L87 Difference]: Start difference. First operand 10419 states and 13046 transitions. Second operand 7 states. [2020-10-14 21:35:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:35:28,945 INFO L93 Difference]: Finished difference Result 25564 states and 35073 transitions. [2020-10-14 21:35:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:35:28,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-14 21:35:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:35:29,044 INFO L225 Difference]: With dead ends: 25564 [2020-10-14 21:35:29,045 INFO L226 Difference]: Without dead ends: 15954 [2020-10-14 21:35:29,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:35:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15954 states. [2020-10-14 21:35:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15954 to 15722. [2020-10-14 21:35:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15722 states. [2020-10-14 21:35:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15722 states to 15722 states and 20306 transitions. [2020-10-14 21:35:29,566 INFO L78 Accepts]: Start accepts. Automaton has 15722 states and 20306 transitions. Word has length 248 [2020-10-14 21:35:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:35:29,569 INFO L479 AbstractCegarLoop]: Abstraction has 15722 states and 20306 transitions. [2020-10-14 21:35:29,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:35:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15722 states and 20306 transitions. [2020-10-14 21:35:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-14 21:35:29,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:35:29,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:35:29,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:35:29,576 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:35:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:35:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -246076367, now seen corresponding path program 1 times [2020-10-14 21:35:29,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:35:29,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663017176] [2020-10-14 21:35:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:35:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:31,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:31,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-14 21:35:31,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:35:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-14 21:35:31,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:31,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:35:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-14 21:35:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 21:35:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:35:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:31,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:31,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:31,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:35:31,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 21:35:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:31,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:35:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:35:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:35:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:35:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:31,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:31,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:35:31,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-14 21:35:31,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:31,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:35:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:35:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 21:35:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:35:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:35:31,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:35:32,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:35:32,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:35:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:35:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 21:35:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:35:32,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:35:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:35:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:35:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:35:32,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:35:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 21:35:32,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663017176] [2020-10-14 21:35:32,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:35:32,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:35:32,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221421165] [2020-10-14 21:35:32,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:35:32,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:35:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:35:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:35:32,416 INFO L87 Difference]: Start difference. First operand 15722 states and 20306 transitions. Second operand 7 states. [2020-10-14 21:36:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:36:18,711 INFO L93 Difference]: Finished difference Result 43091 states and 59974 transitions. [2020-10-14 21:36:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:36:18,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-10-14 21:36:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:36:18,876 INFO L225 Difference]: With dead ends: 43091 [2020-10-14 21:36:18,876 INFO L226 Difference]: Without dead ends: 28178 [2020-10-14 21:36:18,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:36:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28178 states. [2020-10-14 21:36:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28178 to 27808. [2020-10-14 21:36:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27808 states. [2020-10-14 21:36:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27808 states to 27808 states and 35831 transitions. [2020-10-14 21:36:19,867 INFO L78 Accepts]: Start accepts. Automaton has 27808 states and 35831 transitions. Word has length 255 [2020-10-14 21:36:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:36:19,868 INFO L479 AbstractCegarLoop]: Abstraction has 27808 states and 35831 transitions. [2020-10-14 21:36:19,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:36:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 27808 states and 35831 transitions. [2020-10-14 21:36:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-14 21:36:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:36:19,877 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:36:19,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:36:19,878 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:36:19,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:36:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1849837711, now seen corresponding path program 1 times [2020-10-14 21:36:19,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:36:19,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970325060] [2020-10-14 21:36:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:36:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:20,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:20,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-14 21:36:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-14 21:36:20,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:20,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:36:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 232 [2020-10-14 21:36:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 21:36:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:36:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:20,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:20,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:36:20,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:20,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 21:36:20,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:20,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 21:36:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:36:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 21:36:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:20,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:36:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:36:20,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:36:21,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:36:21,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-14 21:36:21,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:36:21,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-14 21:36:21,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:36:21,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:36:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:36:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:36:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-14 21:36:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:36:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:36:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970325060] [2020-10-14 21:36:21,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:36:21,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 21:36:21,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693178987] [2020-10-14 21:36:21,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 21:36:21,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:36:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 21:36:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 21:36:21,690 INFO L87 Difference]: Start difference. First operand 27808 states and 35831 transitions. Second operand 5 states.