/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=0.3 --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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:24:01,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:24:01,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:24:01,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:24:01,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:24:01,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:24:01,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:24:01,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:24:01,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:24:01,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:24:01,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:24:01,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:24:01,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:24:01,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:24:01,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:24:01,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:24:01,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:24:01,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:24:01,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:24:01,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:24:01,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:24:01,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:24:01,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:24:01,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:24:01,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:24:01,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:24:01,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:24:01,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:24:01,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:24:01,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:24:01,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:24:01,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:24:01,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:24:01,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:24:01,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:24:01,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:24:01,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:24:01,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:24:01,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:24:01,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:24:01,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:24:01,823 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 12:24:01,849 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:24:01,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:24:01,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:24:01,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:24:01,851 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:24:01,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:24:01,852 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:24:01,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:24:01,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:24:01,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:24:01,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:24:01,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:24:01,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:24:01,853 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:24:01,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:24:01,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:24:01,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:24:01,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:24:01,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:24:01,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:24:01,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:24:01,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:24:01,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:24:01,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:24:01,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:24:01,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:24:01,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:24:01,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:24:01,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:24:01,857 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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-09-25 12:24:02,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:24:02,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:24:02,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:24:02,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:24:02,343 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:24:02,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-25 12:24:02,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b41055a85/0dfafa50dd7743c7822a657a28048258/FLAG31409de09 [2020-09-25 12:24:03,113 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:24:03,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-25 12:24:03,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b41055a85/0dfafa50dd7743c7822a657a28048258/FLAG31409de09 [2020-09-25 12:24:03,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b41055a85/0dfafa50dd7743c7822a657a28048258 [2020-09-25 12:24:03,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:24:03,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:24:03,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:24:03,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:24:03,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:24:03,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:24:03" (1/1) ... [2020-09-25 12:24:03,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:03, skipping insertion in model container [2020-09-25 12:24:03,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:24:03" (1/1) ... [2020-09-25 12:24:03,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:24:03,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:24:03,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:24:03,911 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:24:04,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:24:04,209 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:24:04,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04 WrapperNode [2020-09-25 12:24:04,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:24:04,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:24:04,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:24:04,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:24:04,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (1/1) ... [2020-09-25 12:24:04,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:24:04,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:24:04,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:24:04,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:24:04,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (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 12:24:04,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:24:04,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:24:04,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:24:04,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:24:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:24:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:24:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:24:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:24:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:24:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:24:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:24:05,818 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:24:05,818 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:24:05,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:24:05 BoogieIcfgContainer [2020-09-25 12:24:05,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:24:05,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:24:05,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:24:05,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:24:05,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:24:03" (1/3) ... [2020-09-25 12:24:05,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:24:05, skipping insertion in model container [2020-09-25 12:24:05,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:04" (2/3) ... [2020-09-25 12:24:05,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:24:05, skipping insertion in model container [2020-09-25 12:24:05,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:24:05" (3/3) ... [2020-09-25 12:24:05,838 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2020-09-25 12:24:05,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:24:05,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:24:05,885 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:24:05,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:24:05,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:24:05,927 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:24:05,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:24:05,927 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:24:05,927 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:24:05,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:24:05,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:24:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 12:24:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 12:24:06,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:06,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:24:06,011 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1730766665, now seen corresponding path program 1 times [2020-09-25 12:24:06,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:06,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100677907] [2020-09-25 12:24:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:06,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:07,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:10,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:11,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:11,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 12:24:11,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:24:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 12:24:11,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:11,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:11,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:24:11,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:24:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 12:24:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 12:24:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:11,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:11,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:11,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:11,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 12:24:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:11,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 12:24:11,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:11,732 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 12:24:11,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100677907] [2020-09-25 12:24:11,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:24:11,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:24:11,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898830629] [2020-09-25 12:24:11,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:24:11,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:24:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:24:11,768 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 12:24:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:14,136 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 12:24:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:24:14,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-09-25 12:24:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:14,163 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 12:24:14,164 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 12:24:14,175 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 12:24:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 12:24:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 12:24:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 12:24:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 12:24:14,281 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 160 [2020-09-25 12:24:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:14,282 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 12:24:14,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:24:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 12:24:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 12:24:14,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:14,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:24:14,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:24:14,289 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2120111358, now seen corresponding path program 1 times [2020-09-25 12:24:14,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:14,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908919714] [2020-09-25 12:24:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:15,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:19,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:19,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 12:24:19,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:24:19,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 12:24:19,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:19,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 12:24:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-09-25 12:24:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 12:24:19,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:19,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:19,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:19,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:24:19,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:19,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:19,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:19,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:19,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:19,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:19,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 12:24:19,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:19,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 12:24:19,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:19,738 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 12:24:19,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908919714] [2020-09-25 12:24:19,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:19,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 12:24:19,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440669307] [2020-09-25 12:24:19,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 12:24:19,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 12:24:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:24:19,744 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 6 states. [2020-09-25 12:24:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:21,706 INFO L93 Difference]: Finished difference Result 1533 states and 1846 transitions. [2020-09-25 12:24:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:21,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2020-09-25 12:24:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:21,719 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 12:24:21,719 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 12:24:21,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:24:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 12:24:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 772. [2020-09-25 12:24:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-09-25 12:24:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 953 transitions. [2020-09-25 12:24:21,765 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 953 transitions. Word has length 177 [2020-09-25 12:24:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:21,766 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 953 transitions. [2020-09-25 12:24:21,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 12:24:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 953 transitions. [2020-09-25 12:24:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 12:24:21,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:21,771 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:24:21,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:24:21,771 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 692129762, now seen corresponding path program 1 times [2020-09-25 12:24:21,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:21,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514759227] [2020-09-25 12:24:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:21,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:25,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:26,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:26,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-09-25 12:24:26,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:24:26,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 12:24:26,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:26,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:26,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:26,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 12:24:26,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 12:24:26,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:24:26,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:26,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:26,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:26,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 12:24:26,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:26,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:26,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:26,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:27,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:27,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 12:24:27,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 12:24:27,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:27,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 12:24:27,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:24:27,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514759227] [2020-09-25 12:24:27,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:27,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:24:27,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722812438] [2020-09-25 12:24:27,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:24:27,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:24:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:24:27,115 INFO L87 Difference]: Start difference. First operand 772 states and 953 transitions. Second operand 5 states. [2020-09-25 12:24:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:29,291 INFO L93 Difference]: Finished difference Result 1849 states and 2392 transitions. [2020-09-25 12:24:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:29,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2020-09-25 12:24:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:29,304 INFO L225 Difference]: With dead ends: 1849 [2020-09-25 12:24:29,306 INFO L226 Difference]: Without dead ends: 1099 [2020-09-25 12:24:29,314 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 12:24:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-09-25 12:24:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1076. [2020-09-25 12:24:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-25 12:24:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1302 transitions. [2020-09-25 12:24:29,371 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1302 transitions. Word has length 186 [2020-09-25 12:24:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:29,373 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1302 transitions. [2020-09-25 12:24:29,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:24:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1302 transitions. [2020-09-25 12:24:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-25 12:24:29,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:29,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:24:29,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:24:29,382 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:29,383 INFO L82 PathProgramCache]: Analyzing trace with hash 882269053, now seen corresponding path program 1 times [2020-09-25 12:24:29,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:29,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726033339] [2020-09-25 12:24:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:29,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:29,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:29,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:34,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:34,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-25 12:24:34,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:24:34,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 12:24:34,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:34,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-09-25 12:24:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 12:24:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:34,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:34,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:34,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:34,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:24:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:34,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:34,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:34,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:34,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:34,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:34,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 12:24:34,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:34,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:24:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:24:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:34,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:34,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:24:34,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 12:24:34,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:34,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 12:24:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 12:24:34,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726033339] [2020-09-25 12:24:34,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:34,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:24:34,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752856521] [2020-09-25 12:24:34,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:24:34,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:34,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:24:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:24:34,781 INFO L87 Difference]: Start difference. First operand 1076 states and 1302 transitions. Second operand 5 states. [2020-09-25 12:24:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:37,046 INFO L93 Difference]: Finished difference Result 2819 states and 3521 transitions. [2020-09-25 12:24:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:37,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-09-25 12:24:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:37,059 INFO L225 Difference]: With dead ends: 2819 [2020-09-25 12:24:37,059 INFO L226 Difference]: Without dead ends: 1765 [2020-09-25 12:24:37,064 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 12:24:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2020-09-25 12:24:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1567. [2020-09-25 12:24:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2020-09-25 12:24:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 1858 transitions. [2020-09-25 12:24:37,127 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 1858 transitions. Word has length 211 [2020-09-25 12:24:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:37,128 INFO L479 AbstractCegarLoop]: Abstraction has 1567 states and 1858 transitions. [2020-09-25 12:24:37,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:24:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 1858 transitions. [2020-09-25 12:24:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-25 12:24:37,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:37,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:24:37,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:24:37,138 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1023567609, now seen corresponding path program 1 times [2020-09-25 12:24:37,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:37,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835535847] [2020-09-25 12:24:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:37,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:41,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:42,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:42,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 12:24:42,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 12:24:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:24:42,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:42,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:42,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:42,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 12:24:42,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:42,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:42,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:42,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:42,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:42,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:42,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:24:42,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:42,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:24:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:42,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:24:42,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 12:24:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:42,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 12:24:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:42,461 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 12:24:42,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835535847] [2020-09-25 12:24:42,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:42,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:24:42,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033063128] [2020-09-25 12:24:42,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:24:42,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:24:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:24:42,463 INFO L87 Difference]: Start difference. First operand 1567 states and 1858 transitions. Second operand 5 states. [2020-09-25 12:24:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:44,405 INFO L93 Difference]: Finished difference Result 3578 states and 4394 transitions. [2020-09-25 12:24:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:44,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-09-25 12:24:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:44,421 INFO L225 Difference]: With dead ends: 3578 [2020-09-25 12:24:44,422 INFO L226 Difference]: Without dead ends: 2033 [2020-09-25 12:24:44,428 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 12:24:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2020-09-25 12:24:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2022. [2020-09-25 12:24:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2022 states. [2020-09-25 12:24:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2395 transitions. [2020-09-25 12:24:44,496 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2395 transitions. Word has length 217 [2020-09-25 12:24:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:44,497 INFO L479 AbstractCegarLoop]: Abstraction has 2022 states and 2395 transitions. [2020-09-25 12:24:44,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:24:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2395 transitions. [2020-09-25 12:24:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-09-25 12:24:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:44,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:44,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:24:44,509 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1338725569, now seen corresponding path program 1 times [2020-09-25 12:24:44,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:44,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604573318] [2020-09-25 12:24:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:44,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:45,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:49,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:49,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-09-25 12:24:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-25 12:24:49,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:24:49,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:49,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:49,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:49,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:24:49,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:49,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:49,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:49,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:49,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:49,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:49,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:24:49,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:49,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:49,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:24:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:50,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:50,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:24:50,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-25 12:24:50,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:50,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:50,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 12:24:50,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 12:24:50,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604573318] [2020-09-25 12:24:50,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:50,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:24:50,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918464036] [2020-09-25 12:24:50,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:24:50,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:24:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:24:50,419 INFO L87 Difference]: Start difference. First operand 2022 states and 2395 transitions. Second operand 7 states.