/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=LOWLEXORDER --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 [2020-09-24 21:35:41,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:35:41,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:35:42,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:35:42,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:35:42,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:35:42,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:35:42,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:35:42,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:35:42,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:35:42,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:35:42,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:35:42,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:35:42,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:35:42,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:35:42,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:35:42,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:35:42,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:35:42,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:35:42,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:35:42,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:35:42,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:35:42,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:35:42,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:35:42,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:35:42,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:35:42,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:35:42,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:35:42,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:35:42,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:35:42,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:35:42,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:35:42,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:35:42,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:35:42,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:35:42,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:35:42,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:35:42,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:35:42,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:35:42,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:35:42,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:35:42,097 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 [2020-09-24 21:35:42,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:35:42,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:35:42,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:35:42,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:35:42,143 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:35:42,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:35:42,144 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:35:42,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:35:42,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:35:42,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:35:42,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:35:42,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:35:42,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:35:42,146 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:35:42,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:35:42,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:35:42,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:35:42,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:35:42,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:35:42,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:35:42,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:35:42,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:35:42,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:35:42,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:35:42,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:35:42,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:35:42,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:35:42,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:35:42,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:35:42,150 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:35:42,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:35:42,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:35:42,682 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:35:42,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:35:42,685 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:35:42,686 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 21:35:42,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81a42493/55571cbc924d414ab563d313d652348f/FLAGc3ede626d [2020-09-24 21:35:43,309 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:35:43,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 21:35:43,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81a42493/55571cbc924d414ab563d313d652348f/FLAGc3ede626d [2020-09-24 21:35:43,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81a42493/55571cbc924d414ab563d313d652348f [2020-09-24 21:35:43,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:35:43,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:35:43,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:43,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:35:43,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:35:43,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:43" (1/1) ... [2020-09-24 21:35:43,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1303a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:43, skipping insertion in model container [2020-09-24 21:35:43,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:43" (1/1) ... [2020-09-24 21:35:43,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:35:43,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:35:43,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:43,988 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:35:44,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:44,035 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:35:44,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44 WrapperNode [2020-09-24 21:35:44,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:44,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:35:44,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:35:44,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:35:44,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (1/1) ... [2020-09-24 21:35:44,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:35:44,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:35:44,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:35:44,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:35:44,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (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 [2020-09-24 21:35:44,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:35:44,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:35:44,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:35:44,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:35:44,236 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 21:35:44,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:35:44,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-24 21:35:44,236 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:35:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:35:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:35:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:35:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:35:44,635 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:35:44,635 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:35:44,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:44 BoogieIcfgContainer [2020-09-24 21:35:44,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:35:44,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:35:44,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:35:44,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:35:44,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:35:43" (1/3) ... [2020-09-24 21:35:44,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:44, skipping insertion in model container [2020-09-24 21:35:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:44" (2/3) ... [2020-09-24 21:35:44,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:44, skipping insertion in model container [2020-09-24 21:35:44,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:44" (3/3) ... [2020-09-24 21:35:44,652 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-24 21:35:44,664 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:35:44,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:35:44,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:35:44,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:35:44,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:35:44,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:35:44,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:35:44,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:35:44,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:35:44,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:35:44,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:35:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-24 21:35:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 21:35:44,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:44,758 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] [2020-09-24 21:35:44,758 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-24 21:35:44,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:44,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861490459] [2020-09-24 21:35:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:45,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 21:35:45,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-09-24 21:35:45,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:35:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 21:35:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:35:45,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:35:45,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:45,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:45,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:45,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:45,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:45,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:35:45,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:45,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:45,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:35:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:45,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:45,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:45,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:45,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:45,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:45,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:45,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:45,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:45,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:35:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:45,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:45,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:45,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:35:45,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:45,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:45,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:35:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:45,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:45,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:45,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:45,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:45,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:45,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 21:35:45,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861490459] [2020-09-24 21:35:45,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:35:45,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 21:35:45,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585299934] [2020-09-24 21:35:45,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:35:45,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:35:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:35:45,883 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-24 21:35:46,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:46,829 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-24 21:35:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:35:46,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-24 21:35:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:46,849 INFO L225 Difference]: With dead ends: 221 [2020-09-24 21:35:46,850 INFO L226 Difference]: Without dead ends: 138 [2020-09-24 21:35:46,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:35:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-24 21:35:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-24 21:35:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 21:35:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-24 21:35:46,937 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-24 21:35:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:46,938 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-24 21:35:46,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:35:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-24 21:35:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:35:46,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:46,942 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] [2020-09-24 21:35:46,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:35:46,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-24 21:35:46,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:46,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793091181] [2020-09-24 21:35:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:46,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:35:49,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:35:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2340 [2020-09-24 21:35:49,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:35:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:35:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:35:49,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:49,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:49,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:35:49,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:49,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:49,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:35:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:49,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:49,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:49,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:49,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:35:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:49,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:49,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:35:49,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:35:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:49,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:35:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:49,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:49,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:49,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:35:49,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:49,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:35:49,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:49,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 21:35:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:49,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:49,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:35:49,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:35:49,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:35:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:35:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:35:49,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793091181] [2020-09-24 21:35:49,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:35:49,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 21:35:49,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85266143] [2020-09-24 21:35:49,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:35:49,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:35:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:35:49,957 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-24 21:35:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:51,748 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-24 21:35:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:35:51,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-24 21:35:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:51,752 INFO L225 Difference]: With dead ends: 170 [2020-09-24 21:35:51,752 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 21:35:51,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:35:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 21:35:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-24 21:35:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 21:35:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-24 21:35:51,774 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-24 21:35:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:51,774 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-24 21:35:51,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:35:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-24 21:35:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:35:51,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:51,777 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] [2020-09-24 21:35:51,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:35:51,778 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-24 21:35:51,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:51,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194542943] [2020-09-24 21:35:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:54,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:54,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 21:35:54,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:35:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3157 [2020-09-24 21:35:54,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:35:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 21:35:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:35:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:55,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:55,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:55,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:55,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:35:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:55,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:35:55,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:35:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:55,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:55,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:35:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:55,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:55,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:55,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:35:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:55,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:35:55,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:55,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 21:35:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:55,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:55,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:55,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:55,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:55,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:35:55,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 21:35:55,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194542943] [2020-09-24 21:35:55,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:35:55,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:35:55,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228058191] [2020-09-24 21:35:55,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:35:55,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:55,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:35:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:35:55,363 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-24 21:35:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:57,040 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-24 21:35:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:35:57,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 21:35:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:57,044 INFO L225 Difference]: With dead ends: 195 [2020-09-24 21:35:57,044 INFO L226 Difference]: Without dead ends: 193 [2020-09-24 21:35:57,048 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 [2020-09-24 21:35:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-24 21:35:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-24 21:35:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 21:35:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-24 21:35:57,094 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-24 21:35:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:57,095 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-24 21:35:57,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:35:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-24 21:35:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:35:57,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:57,101 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] [2020-09-24 21:35:57,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:35:57,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-24 21:35:57,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:57,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779357048] [2020-09-24 21:35:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 21:36:02,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:36:02,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:36:02,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:36:02,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 21:36:02,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:36:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:02,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:02,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:36:02,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:36:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:02,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:36:02,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:02,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:02,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:36:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:02,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:36:02,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:36:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:36:02,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:02,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:36:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:36:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:02,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:36:02,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 21:36:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:02,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:02,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:02,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 21:36:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779357048] [2020-09-24 21:36:02,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:02,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 21:36:02,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640674985] [2020-09-24 21:36:02,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:36:02,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:36:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:36:02,390 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 11 states. [2020-09-24 21:36:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:02,902 INFO L93 Difference]: Finished difference Result 244 states and 266 transitions. [2020-09-24 21:36:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:36:02,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-24 21:36:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:02,904 INFO L225 Difference]: With dead ends: 244 [2020-09-24 21:36:02,905 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 21:36:02,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:36:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 21:36:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-09-24 21:36:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-24 21:36:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2020-09-24 21:36:02,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 67 [2020-09-24 21:36:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:02,922 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2020-09-24 21:36:02,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:36:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2020-09-24 21:36:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:36:02,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:02,925 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] [2020-09-24 21:36:02,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:36:02,925 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-24 21:36:02,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:02,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646325576] [2020-09-24 21:36:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:03,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:07,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:07,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 21:36:07,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:36:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:36:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 21:36:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:36:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 21:36:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:09,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:36:09,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:36:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:09,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:36:09,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:09,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:09,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:36:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:09,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:09,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:36:09,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:36:09,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:36:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:36:09,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:09,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:09,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:36:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:36:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:09,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 21:36:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:09,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:36:09,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:09,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 21:36:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:09,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:09,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:36:09,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:09,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-24 21:36:09,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:36:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:36:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 21:36:09,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646325576] [2020-09-24 21:36:09,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:09,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 21:36:09,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611866925] [2020-09-24 21:36:09,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 21:36:09,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 21:36:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:36:09,604 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 29 states. [2020-09-24 21:36:11,028 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-09-24 21:36:11,227 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-09-24 21:36:11,405 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-09-24 21:36:11,585 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-09-24 21:36:11,771 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-09-24 21:36:11,965 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-09-24 21:36:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:14,102 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-09-24 21:36:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 21:36:14,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-09-24 21:36:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:14,107 INFO L225 Difference]: With dead ends: 171 [2020-09-24 21:36:14,107 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 21:36:14,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=486, Invalid=3296, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 21:36:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 21:36:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-09-24 21:36:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 21:36:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2020-09-24 21:36:14,124 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 79 [2020-09-24 21:36:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:14,124 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2020-09-24 21:36:14,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 21:36:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2020-09-24 21:36:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-24 21:36:14,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:14,127 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] [2020-09-24 21:36:14,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:36:14,128 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1486199216, now seen corresponding path program 2 times [2020-09-24 21:36:14,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:14,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448618367] [2020-09-24 21:36:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:14,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 21:36:19,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:36:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:36:19,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:36:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 21:36:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:36:19,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:19,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:36:19,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:36:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:36:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:19,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:36:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:36:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:19,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:19,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 21:36:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:36:19,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 21:36:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:19,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:19,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 21:36:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:19,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:19,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:19,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:19,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:36:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 21:36:19,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448618367] [2020-09-24 21:36:19,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:19,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:36:19,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172651925] [2020-09-24 21:36:19,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:36:19,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:36:19,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:36:19,667 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand 20 states. [2020-09-24 21:36:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:21,855 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-24 21:36:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:36:21,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-24 21:36:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:21,859 INFO L225 Difference]: With dead ends: 170 [2020-09-24 21:36:21,859 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 21:36:21,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 21:36:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 21:36:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-09-24 21:36:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-24 21:36:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 177 transitions. [2020-09-24 21:36:21,875 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 177 transitions. Word has length 94 [2020-09-24 21:36:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:21,875 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 177 transitions. [2020-09-24 21:36:21,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:36:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 177 transitions. [2020-09-24 21:36:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 21:36:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:21,880 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:21,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:36:21,880 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1644689056, now seen corresponding path program 1 times [2020-09-24 21:36:21,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:21,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307906724] [2020-09-24 21:36:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:22,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:22,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:27,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:27,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 21:36:27,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:36:27,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5697 [2020-09-24 21:36:27,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 21:36:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:36:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 21:36:27,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:27,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:27,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:27,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:27,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:36:27,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:27,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:36:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:27,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:27,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:27,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:27,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:36:27,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:27,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 21:36:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:27,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:27,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:27,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:36:27,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:36:27,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:28,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:36:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:28,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:36:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:28,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:36:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 21:36:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:29,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking...