/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 SingleStatement --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:16:28,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:16:28,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:16:28,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:16:28,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:16:28,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:16:28,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:16:28,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:16:28,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:16:28,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:16:28,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:16:28,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:16:28,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:16:28,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:16:28,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:16:28,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:16:28,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:16:28,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:16:28,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:16:28,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:16:28,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:16:28,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:16:28,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:16:28,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:16:28,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:16:28,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:16:28,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:16:28,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:16:28,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:16:28,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:16:28,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:16:28,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:16:28,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:16:28,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:16:28,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:16:28,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:16:28,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:16:28,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:16:28,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:16:28,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:16:28,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:16:28,866 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 [2020-09-25 11:16:28,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:16:28,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:16:28,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:16:28,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:16:28,919 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:16:28,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:16:28,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:16:28,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:16:28,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:16:28,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:16:28,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:16:28,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:16:28,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:16:28,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:16:28,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:16:28,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:16:28,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:16:28,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:16:28,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:16:28,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:16:28,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:16:28,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:16:28,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:16:28,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:16:28,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:16:28,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:16:28,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:16:28,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:16:28,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:16:28,926 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 -> SingleStatement 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; 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; 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; 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; 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; 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; [2020-09-25 11:16:29,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:16:29,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:16:29,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:16:29,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:16:29,412 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:16:29,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 11:16:29,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4c789d8d/c355c77deb184a06babf3f37117a8294/FLAG3df779757 [2020-09-25 11:16:30,181 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:16:30,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 11:16:30,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4c789d8d/c355c77deb184a06babf3f37117a8294/FLAG3df779757 [2020-09-25 11:16:30,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4c789d8d/c355c77deb184a06babf3f37117a8294 [2020-09-25 11:16:30,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:16:30,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:16:30,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:30,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:16:30,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:16:30,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:30" (1/1) ... [2020-09-25 11:16:30,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:30, skipping insertion in model container [2020-09-25 11:16:30,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:30" (1/1) ... [2020-09-25 11:16:30,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:16:30,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:16:30,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:30,926 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:16:31,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:31,189 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:16:31,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31 WrapperNode [2020-09-25 11:16:31,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:31,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:16:31,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:16:31,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:16:31,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (1/1) ... [2020-09-25 11:16:31,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:16:31,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:16:31,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:16:31,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:16:31,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (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 [2020-09-25 11:16:31,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:16:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:16:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:16:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:16:31,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:16:31,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:16:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:16:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:16:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:16:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:16:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:16:32,648 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:16:32,649 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:16:32,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:32 BoogieIcfgContainer [2020-09-25 11:16:32,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:16:32,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:16:32,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:16:32,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:16:32,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:16:30" (1/3) ... [2020-09-25 11:16:32,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c445f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:32, skipping insertion in model container [2020-09-25 11:16:32,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:31" (2/3) ... [2020-09-25 11:16:32,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c445f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:32, skipping insertion in model container [2020-09-25 11:16:32,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:32" (3/3) ... [2020-09-25 11:16:32,668 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2020-09-25 11:16:32,679 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:16:32,691 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:16:32,713 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:16:32,747 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:16:32,747 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:16:32,747 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:16:32,748 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:16:32,748 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:16:32,748 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:16:32,748 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:16:32,748 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:16:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:16:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-25 11:16:32,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:32,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:32,806 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1105966209, now seen corresponding path program 1 times [2020-09-25 11:16:32,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:32,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11241220] [2020-09-25 11:16:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:34,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:34,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:36,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:38,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:38,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-25 11:16:38,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:16:38,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-25 11:16:38,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:38,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:16:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 11:16:38,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 11:16:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:38,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:38,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:38,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:38,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 11:16:38,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:38,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:38,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:38,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:16:38,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:16:38,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11241220] [2020-09-25 11:16:38,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:16:38,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:16:38,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969241015] [2020-09-25 11:16:38,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:16:38,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:38,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:16:38,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:16:38,573 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:16:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:40,916 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 11:16:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:16:40,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-09-25 11:16:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:40,955 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 11:16:40,955 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 11:16:40,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 11:16:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 11:16:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 11:16:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 11:16:41,149 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 150 [2020-09-25 11:16:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:41,153 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 11:16:41,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:16:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 11:16:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-25 11:16:41,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:41,168 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:16:41,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:16:41,169 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash 93952890, now seen corresponding path program 1 times [2020-09-25 11:16:41,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:41,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667008675] [2020-09-25 11:16:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:46,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:46,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 11:16:46,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 11:16:46,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:46,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:16:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 11:16:46,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:16:46,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:46,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:46,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:46,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:16:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:46,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:46,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:16:46,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:46,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:16:46,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:46,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:16:46,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:16:46,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667008675] [2020-09-25 11:16:46,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:46,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:46,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090443836] [2020-09-25 11:16:46,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:46,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:46,526 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 11:16:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:48,261 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 11:16:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:48,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-09-25 11:16:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:48,276 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 11:16:48,276 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 11:16:48,281 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 [2020-09-25 11:16:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 11:16:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 11:16:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 11:16:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 11:16:48,348 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 167 [2020-09-25 11:16:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:48,349 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 11:16:48,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 11:16:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 11:16:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:48,355 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:48,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:16:48,355 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1954637387, now seen corresponding path program 1 times [2020-09-25 11:16:48,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:48,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618933676] [2020-09-25 11:16:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:53,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-09-25 11:16:53,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:16:53,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 11:16:53,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:53,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:16:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:16:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 11:16:53,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:53,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:53,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:53,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:53,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:16:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:53,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:53,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:53,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:16:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:53,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:16:53,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:53,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:16:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:53,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:53,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:16:53,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:16:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-25 11:16:53,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:53,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:53,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:16:53,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:16:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 11:16:54,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618933676] [2020-09-25 11:16:54,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:54,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:16:54,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108282594] [2020-09-25 11:16:54,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:16:54,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:16:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:16:54,204 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 11 states. [2020-09-25 11:16:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:58,006 INFO L93 Difference]: Finished difference Result 1998 states and 2521 transitions. [2020-09-25 11:16:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:16:58,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 201 [2020-09-25 11:16:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:58,014 INFO L225 Difference]: With dead ends: 1998 [2020-09-25 11:16:58,014 INFO L226 Difference]: Without dead ends: 820 [2020-09-25 11:16:58,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:16:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2020-09-25 11:16:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 656. [2020-09-25 11:16:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-09-25 11:16:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 727 transitions. [2020-09-25 11:16:58,040 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 727 transitions. Word has length 201 [2020-09-25 11:16:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:58,041 INFO L479 AbstractCegarLoop]: Abstraction has 656 states and 727 transitions. [2020-09-25 11:16:58,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:16:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 727 transitions. [2020-09-25 11:16:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-25 11:16:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:58,046 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:58,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:16:58,046 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1990225871, now seen corresponding path program 1 times [2020-09-25 11:16:58,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:58,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815693844] [2020-09-25 11:16:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:58,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:01,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:01,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:03,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-09-25 11:17:03,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:17:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:17:03,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:03,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-09-25 11:17:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 11:17:03,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:03,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:03,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:03,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:17:03,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:03,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:03,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:03,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:03,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:17:03,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:03,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:17:03,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:03,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:03,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:03,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:03,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:17:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:03,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:17:03,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:03,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 11:17:03,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:03,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:03,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:17:03,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 11:17:03,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815693844] [2020-09-25 11:17:03,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:03,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:17:03,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507361153] [2020-09-25 11:17:03,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:17:03,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:17:03,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:17:03,408 INFO L87 Difference]: Start difference. First operand 656 states and 727 transitions. Second operand 5 states. [2020-09-25 11:17:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:05,136 INFO L93 Difference]: Finished difference Result 1815 states and 2048 transitions. [2020-09-25 11:17:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:17:05,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-09-25 11:17:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:05,146 INFO L225 Difference]: With dead ends: 1815 [2020-09-25 11:17:05,147 INFO L226 Difference]: Without dead ends: 1016 [2020-09-25 11:17:05,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:17:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2020-09-25 11:17:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 958. [2020-09-25 11:17:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-09-25 11:17:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1078 transitions. [2020-09-25 11:17:05,185 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1078 transitions. Word has length 207 [2020-09-25 11:17:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:05,186 INFO L479 AbstractCegarLoop]: Abstraction has 958 states and 1078 transitions. [2020-09-25 11:17:05,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:17:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1078 transitions. [2020-09-25 11:17:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-25 11:17:05,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:05,192 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-09-25 11:17:05,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:17:05,193 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 936003417, now seen corresponding path program 1 times [2020-09-25 11:17:05,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:05,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943500689] [2020-09-25 11:17:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:07,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:08,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:10,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-09-25 11:17:10,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:17:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 11:17:10,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:10,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 11:17:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:17:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-09-25 11:17:10,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:10,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:10,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:10,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:10,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:10,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 11:17:10,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:10,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:10,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:10,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:10,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:17:10,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:10,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:10,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:10,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:17:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 11:17:10,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:10,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:17:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:11,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-25 11:17:11,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:17:11,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943500689] [2020-09-25 11:17:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:17:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984691632] [2020-09-25 11:17:11,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:17:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:17:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:17:11,569 INFO L87 Difference]: Start difference. First operand 958 states and 1078 transitions. Second operand 15 states. [2020-09-25 11:17:12,192 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-09-25 11:17:13,145 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-09-25 11:17:14,585 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-09-25 11:17:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:19,544 INFO L93 Difference]: Finished difference Result 5655 states and 7074 transitions. [2020-09-25 11:17:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 11:17:19,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 248 [2020-09-25 11:17:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:19,573 INFO L225 Difference]: With dead ends: 5655 [2020-09-25 11:17:19,573 INFO L226 Difference]: Without dead ends: 3439 [2020-09-25 11:17:19,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2020-09-25 11:17:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2020-09-25 11:17:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 3187. [2020-09-25 11:17:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3187 states. [2020-09-25 11:17:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 3646 transitions. [2020-09-25 11:17:19,704 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 3646 transitions. Word has length 248 [2020-09-25 11:17:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:19,705 INFO L479 AbstractCegarLoop]: Abstraction has 3187 states and 3646 transitions. [2020-09-25 11:17:19,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:17:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 3646 transitions. [2020-09-25 11:17:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-25 11:17:19,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:19,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:19,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:17:19,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1153593156, now seen corresponding path program 1 times [2020-09-25 11:17:19,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:19,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928313853] [2020-09-25 11:17:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:20,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking...