/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:47:32,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:47:32,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:47:32,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:47:32,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:47:32,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:47:32,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:47:32,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:47:32,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:47:32,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:47:32,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:47:32,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:47:32,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:47:32,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:47:32,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:47:32,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:47:32,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:47:32,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:47:32,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:47:32,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:47:32,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:47:32,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:47:32,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:47:32,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:47:32,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:47:32,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:47:32,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:47:32,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:47:32,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:47:32,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:47:32,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:47:32,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:47:32,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:47:32,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:47:32,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:47:32,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:47:32,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:47:32,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:47:32,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:47:32,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:47:32,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:47:32,961 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 07:47:32,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:47:32,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:47:32,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:47:32,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:47:32,989 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:47:32,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:47:32,990 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:47:32,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:47:32,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:47:32,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:47:32,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:47:32,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:47:32,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:47:32,991 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:47:32,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:47:32,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:47:32,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:47:32,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:47:32,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:47:32,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:47:32,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:47:32,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:47:32,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:47:32,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:47:32,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:47:32,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:47:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:47:32,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:47:32,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:47:32,994 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:47:33,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:47:33,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:47:33,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:47:33,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:47:33,487 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:47:33,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 07:47:33,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e5678641/b132ee64f07b402180dfcb4fc3ab2ea6/FLAG82bcf054d [2020-09-25 07:47:34,136 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:47:34,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 07:47:34,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e5678641/b132ee64f07b402180dfcb4fc3ab2ea6/FLAG82bcf054d [2020-09-25 07:47:34,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e5678641/b132ee64f07b402180dfcb4fc3ab2ea6 [2020-09-25 07:47:34,479 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:47:34,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:47:34,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:47:34,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:47:34,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:47:34,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a05326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34, skipping insertion in model container [2020-09-25 07:47:34,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:47:34,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:47:34,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:47:34,786 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:47:34,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:47:34,843 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:47:34,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34 WrapperNode [2020-09-25 07:47:34,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:47:34,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:47:34,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:47:34,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:47:34,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (1/1) ... [2020-09-25 07:47:34,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:47:34,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:47:34,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:47:34,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:47:34,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (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 07:47:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:47:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:47:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 07:47:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 07:47:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 07:47:35,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:47:35,060 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-25 07:47:35,060 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 07:47:35,060 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:47:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 07:47:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 07:47:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:47:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 07:47:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-25 07:47:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 07:47:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:47:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:47:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 07:47:35,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:47:35,428 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 07:47:35,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:47:35 BoogieIcfgContainer [2020-09-25 07:47:35,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:47:35,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:47:35,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:47:35,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:47:35,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:47:34" (1/3) ... [2020-09-25 07:47:35,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135aa276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:47:35, skipping insertion in model container [2020-09-25 07:47:35,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:47:34" (2/3) ... [2020-09-25 07:47:35,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135aa276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:47:35, skipping insertion in model container [2020-09-25 07:47:35,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:47:35" (3/3) ... [2020-09-25 07:47:35,443 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-25 07:47:35,454 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:47:35,465 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:47:35,485 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:47:35,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:47:35,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:47:35,513 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:47:35,513 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:47:35,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:47:35,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:47:35,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:47:35,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:47:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-25 07:47:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 07:47:35,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:47:35,547 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 07:47:35,547 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:47:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:47:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-25 07:47:35,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:47:35,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310618119] [2020-09-25 07:47:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:47:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:35,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:36,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:36,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 07:47:36,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:36,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-09-25 07:47:36,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:36,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:36,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 07:47:36,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 07:47:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 07:47:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:47:36,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:47:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:36,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:36,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:47:36,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:36,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:47:36,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:36,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:36,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:36,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:36,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:36,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:47:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:36,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:36,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:36,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:47:36,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:36,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:36,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:47:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:36,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:36,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:36,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:36,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:36,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:47:36,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:36,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:36,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:36,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:36,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:36,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:47:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:36,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:36,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:36,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:47:36,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:36,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:47:36,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:36,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 07:47:36,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310618119] [2020-09-25 07:47:36,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:47:36,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 07:47:36,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261998706] [2020-09-25 07:47:36,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 07:47:36,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:47:36,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 07:47:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 07:47:36,674 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-25 07:47:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:47:37,575 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-25 07:47:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 07:47:37,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 07:47:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:47:37,603 INFO L225 Difference]: With dead ends: 221 [2020-09-25 07:47:37,604 INFO L226 Difference]: Without dead ends: 138 [2020-09-25 07:47:37,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-25 07:47:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-25 07:47:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-25 07:47:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-25 07:47:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-25 07:47:37,745 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-25 07:47:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:47:37,749 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-25 07:47:37,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 07:47:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-25 07:47:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 07:47:37,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:47:37,755 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 07:47:37,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:47:37,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:47:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:47:37,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-25 07:47:37,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:47:37,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968687581] [2020-09-25 07:47:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:47:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 07:47:40,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:47:40,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-09-25 07:47:40,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 07:47:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 07:47:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 07:47:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:47:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:47:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:47:40,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:40,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:47:40,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:40,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:47:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:40,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:40,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:40,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:47:40,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:40,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:40,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:47:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:40,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:40,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:40,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:47:40,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:47:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 07:47:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:40,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:47:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:47:40,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:40,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:47:40,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:47:40,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:40,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:47:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:40,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 07:47:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:40,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:40,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:40,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:47:40,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:40,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 07:47:40,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:40,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:40,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:47:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 07:47:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:47:40,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968687581] [2020-09-25 07:47:40,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:47:40,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-25 07:47:40,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882510070] [2020-09-25 07:47:40,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 07:47:40,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:47:40,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 07:47:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-25 07:47:40,864 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-25 07:47:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:47:42,489 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-25 07:47:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 07:47:42,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-25 07:47:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:47:42,494 INFO L225 Difference]: With dead ends: 170 [2020-09-25 07:47:42,494 INFO L226 Difference]: Without dead ends: 151 [2020-09-25 07:47:42,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 07:47:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-25 07:47:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-25 07:47:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 07:47:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-25 07:47:42,516 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-25 07:47:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:47:42,516 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-25 07:47:42,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 07:47:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-25 07:47:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 07:47:42,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:47:42,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 07:47:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:47:42,520 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:47:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:47:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-25 07:47:42,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:47:42,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142757902] [2020-09-25 07:47:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:47:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 07:47:45,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:47:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3040 [2020-09-25 07:47:45,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 07:47:45,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 07:47:45,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 07:47:45,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:47:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:47:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:47:45,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:45,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:47:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:45,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:47:45,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:45,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:45,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:47:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:45,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:47:45,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:45,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:45,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:47:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:47:45,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:47:45,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:45,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:45,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 07:47:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:45,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:47:45,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:47:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:47:45,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:47:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:45,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:45,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:45,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:45,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:47:45,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:45,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:47:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:47:45,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 07:47:45,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142757902] [2020-09-25 07:47:45,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:47:45,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 07:47:45,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858111892] [2020-09-25 07:47:45,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 07:47:45,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:47:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 07:47:45,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-25 07:47:45,914 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-25 07:47:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:47:47,508 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-25 07:47:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 07:47:47,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-25 07:47:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:47:47,517 INFO L225 Difference]: With dead ends: 195 [2020-09-25 07:47:47,517 INFO L226 Difference]: Without dead ends: 193 [2020-09-25 07:47:47,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-25 07:47:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-25 07:47:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-25 07:47:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 07:47:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-25 07:47:47,562 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-25 07:47:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:47:47,563 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-25 07:47:47,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 07:47:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-25 07:47:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 07:47:47,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:47:47,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 07:47:47,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:47:47,569 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:47:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:47:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-25 07:47:47,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:47:47,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559948952] [2020-09-25 07:47:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:47:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:47,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:47,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 07:47:52,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:47:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 07:47:52,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 07:47:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 07:47:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 07:47:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 07:47:52,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:47:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:47:52,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:47:52,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:52,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:52,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:52,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:47:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:52,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:47:52,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:47:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:52,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:47:52,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:52,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:52,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:47:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:47:52,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:47:52,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:47:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:47:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:47:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 07:47:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:52,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:47:52,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:47:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:47:52,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:52,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:47:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:52,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:52,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:47:52,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:47:52,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 07:47:52,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:52,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:47:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:47:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:47:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:47:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 07:47:52,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559948952] [2020-09-25 07:47:52,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:47:52,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 07:47:52,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127427250] [2020-09-25 07:47:52,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 07:47:52,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:47:52,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 07:47:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:47:52,982 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 16 states. [2020-09-25 07:47:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:47:54,925 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-09-25 07:47:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 07:47:54,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-25 07:47:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:47:54,928 INFO L225 Difference]: With dead ends: 237 [2020-09-25 07:47:54,929 INFO L226 Difference]: Without dead ends: 235 [2020-09-25 07:47:54,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 07:47:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-25 07:47:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 207. [2020-09-25 07:47:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-25 07:47:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2020-09-25 07:47:54,955 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 67 [2020-09-25 07:47:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:47:54,956 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2020-09-25 07:47:54,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 07:47:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2020-09-25 07:47:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 07:47:54,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:47:54,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 07:47:54,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:47:54,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:47:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:47:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-25 07:47:54,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:47:54,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218930974] [2020-09-25 07:47:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:47:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:47:55,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:55,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:55,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:47:59,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:47:59,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 07:47:59,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:47:59,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 07:47:59,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:47:59,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:47:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 07:47:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 07:47:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 07:47:59,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:48:00,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:00,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:48:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:00,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:48:00,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:00,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:48:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:00,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:48:00,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:00,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:48:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:48:00,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:48:00,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:48:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 07:48:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:00,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:48:00,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:48:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:00,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:00,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-25 07:48:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:00,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:00,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:48:00,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:48:00,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:00,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 07:48:00,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 07:48:00,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218930974] [2020-09-25 07:48:00,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:48:00,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 07:48:00,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132911641] [2020-09-25 07:48:00,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 07:48:00,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 07:48:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-25 07:48:00,311 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand 15 states. [2020-09-25 07:48:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:01,314 INFO L93 Difference]: Finished difference Result 219 states and 240 transitions. [2020-09-25 07:48:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 07:48:01,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-09-25 07:48:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:01,321 INFO L225 Difference]: With dead ends: 219 [2020-09-25 07:48:01,321 INFO L226 Difference]: Without dead ends: 217 [2020-09-25 07:48:01,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-09-25 07:48:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-25 07:48:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2020-09-25 07:48:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-09-25 07:48:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 229 transitions. [2020-09-25 07:48:01,343 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 229 transitions. Word has length 79 [2020-09-25 07:48:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:01,344 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 229 transitions. [2020-09-25 07:48:01,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 07:48:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 229 transitions. [2020-09-25 07:48:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 07:48:01,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:01,347 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 07:48:01,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:48:01,347 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1486199216, now seen corresponding path program 2 times [2020-09-25 07:48:01,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:01,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454112711] [2020-09-25 07:48:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 07:48:06,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:48:06,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 07:48:06,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 07:48:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 07:48:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 07:48:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:06,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:06,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:48:06,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:48:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:48:06,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:48:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 07:48:06,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:48:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:48:06,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:48:06,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:06,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:06,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 07:48:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:06,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:06,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:48:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:06,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:06,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 07:48:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:48:06,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 07:48:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:06,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:06,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:06,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:06,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:06,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:06,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:06,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 07:48:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454112711] [2020-09-25 07:48:06,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:48:06,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 07:48:06,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713466103] [2020-09-25 07:48:06,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 07:48:06,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 07:48:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-25 07:48:06,909 INFO L87 Difference]: Start difference. First operand 211 states and 229 transitions. Second operand 20 states. [2020-09-25 07:48:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:09,533 INFO L93 Difference]: Finished difference Result 298 states and 326 transitions. [2020-09-25 07:48:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 07:48:09,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-25 07:48:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:09,538 INFO L225 Difference]: With dead ends: 298 [2020-09-25 07:48:09,538 INFO L226 Difference]: Without dead ends: 296 [2020-09-25 07:48:09,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 07:48:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-25 07:48:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 255. [2020-09-25 07:48:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-09-25 07:48:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 279 transitions. [2020-09-25 07:48:09,560 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 279 transitions. Word has length 94 [2020-09-25 07:48:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:09,561 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 279 transitions. [2020-09-25 07:48:09,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 07:48:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 279 transitions. [2020-09-25 07:48:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 07:48:09,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:09,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:09,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 07:48:09,564 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1687005104, now seen corresponding path program 1 times [2020-09-25 07:48:09,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:09,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182225567] [2020-09-25 07:48:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:09,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:10,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:14,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:14,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 07:48:14,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:48:14,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 07:48:14,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:14,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 07:48:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 07:48:14,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 07:48:14,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:14,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:14,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:14,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:14,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 07:48:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:14,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:14,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:14,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:14,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:48:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:14,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:14,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:14,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 07:48:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:14,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:14,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 07:48:14,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:14,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:48:14,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:14,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:14,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:14,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 07:48:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:15,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:15,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:15,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:15,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:15,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:15,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:15,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:15,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:48:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:15,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:15,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:15,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:15,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:15,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:15,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:15,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:15,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 07:48:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:15,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:15,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:15,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:15,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:48:15,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 07:48:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:15,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:15,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 07:48:15,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:15,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:48:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 07:48:15,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182225567] [2020-09-25 07:48:15,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:48:15,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 07:48:15,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084054983] [2020-09-25 07:48:15,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 07:48:15,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 07:48:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-25 07:48:15,083 INFO L87 Difference]: Start difference. First operand 255 states and 279 transitions. Second operand 20 states. [2020-09-25 07:48:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:18,229 INFO L93 Difference]: Finished difference Result 343 states and 377 transitions. [2020-09-25 07:48:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 07:48:18,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-25 07:48:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:18,233 INFO L225 Difference]: With dead ends: 343 [2020-09-25 07:48:18,234 INFO L226 Difference]: Without dead ends: 341 [2020-09-25 07:48:18,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 07:48:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-09-25 07:48:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 298. [2020-09-25 07:48:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-09-25 07:48:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 327 transitions. [2020-09-25 07:48:18,256 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 327 transitions. Word has length 94 [2020-09-25 07:48:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:18,257 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 327 transitions. [2020-09-25 07:48:18,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 07:48:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 327 transitions. [2020-09-25 07:48:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 07:48:18,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:18,259 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:18,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 07:48:18,260 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 766068976, now seen corresponding path program 2 times [2020-09-25 07:48:18,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:18,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615742760] [2020-09-25 07:48:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:18,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:18,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking...