/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:55:26,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:26,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:26,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:26,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:26,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:26,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:26,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:26,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:26,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:26,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:26,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:26,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:26,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:26,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:26,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:26,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:26,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:26,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:26,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:26,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:26,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:26,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:26,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:26,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:26,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:26,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:26,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:26,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:26,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:26,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:26,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:26,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:26,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:26,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:26,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:26,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:26,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:26,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:26,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:26,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:26,163 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 22:55:26,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:26,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:26,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:26,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:26,215 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:26,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:26,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:26,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:26,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:26,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:26,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:26,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:26,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:26,218 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:26,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:26,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:26,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:26,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:26,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:26,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:26,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:26,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:26,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:26,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:26,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:26,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:26,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:26,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:26,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:26,221 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:26,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:26,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:26,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:26,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:26,814 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:26,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 22:55:26,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fe5859a/c02d5149f82c4fd9a83ab19e68dee2f7/FLAG2cf958750 [2020-09-24 22:55:27,422 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:27,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 22:55:27,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fe5859a/c02d5149f82c4fd9a83ab19e68dee2f7/FLAG2cf958750 [2020-09-24 22:55:27,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fe5859a/c02d5149f82c4fd9a83ab19e68dee2f7 [2020-09-24 22:55:27,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:27,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:27,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:27,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:27,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:27,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:27" (1/1) ... [2020-09-24 22:55:27,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb9461a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:27, skipping insertion in model container [2020-09-24 22:55:27,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:27" (1/1) ... [2020-09-24 22:55:27,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:27,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:28,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:28,112 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:28,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:28,272 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:28,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28 WrapperNode [2020-09-24 22:55:28,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:28,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:28,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:28,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:28,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:28,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:28,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:28,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:28,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (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 22:55:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:28,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:55:28,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-09-24 22:55:28,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:28,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-09-24 22:55:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 22:55:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 22:55:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:55:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:55:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:29,115 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:29,116 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-24 22:55:29,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:29 BoogieIcfgContainer [2020-09-24 22:55:29,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:29,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:29,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:29,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:29,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:27" (1/3) ... [2020-09-24 22:55:29,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ec8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:29, skipping insertion in model container [2020-09-24 22:55:29,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (2/3) ... [2020-09-24 22:55:29,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ec8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:29, skipping insertion in model container [2020-09-24 22:55:29,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:29" (3/3) ... [2020-09-24 22:55:29,134 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-09-24 22:55:29,147 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:29,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:29,185 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:29,215 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:29,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:29,216 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:29,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:29,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:29,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:29,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:29,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-09-24 22:55:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 22:55:29,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:29,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:29,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1445504148, now seen corresponding path program 1 times [2020-09-24 22:55:29,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:29,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578241129] [2020-09-24 22:55:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:30,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 22:55:30,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 22:55:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-09-24 22:55:30,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:30,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:30,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 22:55:30,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:55:30,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:55:30,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:30,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:30,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:30,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 22:55:30,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578241129] [2020-09-24 22:55:30,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:30,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 22:55:30,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186958098] [2020-09-24 22:55:30,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:55:30,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:55:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:55:30,844 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 8 states. [2020-09-24 22:55:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:31,852 INFO L93 Difference]: Finished difference Result 377 states and 446 transitions. [2020-09-24 22:55:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:55:31,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-24 22:55:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:31,871 INFO L225 Difference]: With dead ends: 377 [2020-09-24 22:55:31,871 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 22:55:31,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 22:55:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-09-24 22:55:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 22:55:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-09-24 22:55:31,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 30 [2020-09-24 22:55:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:31,944 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-09-24 22:55:31,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:55:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-09-24 22:55:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 22:55:31,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:31,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:31,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:31,947 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash -905808642, now seen corresponding path program 1 times [2020-09-24 22:55:31,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:31,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008024334] [2020-09-24 22:55:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:33,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:33,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 22:55:33,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 22:55:33,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1245 [2020-09-24 22:55:33,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:33,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 22:55:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 22:55:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 22:55:33,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:33,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:33,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:33,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:33,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:33,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 22:55:33,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:33,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:33,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:33,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008024334] [2020-09-24 22:55:33,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:33,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:55:33,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438190343] [2020-09-24 22:55:33,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:55:33,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:55:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:33,448 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-09-24 22:55:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:34,143 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-09-24 22:55:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:55:34,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-24 22:55:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:34,146 INFO L225 Difference]: With dead ends: 108 [2020-09-24 22:55:34,147 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 22:55:34,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-09-24 22:55:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 22:55:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-09-24 22:55:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 22:55:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-09-24 22:55:34,183 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 39 [2020-09-24 22:55:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:34,184 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-09-24 22:55:34,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:55:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-09-24 22:55:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 22:55:34,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:34,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:34,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:34,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1206774819, now seen corresponding path program 1 times [2020-09-24 22:55:34,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:34,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803390265] [2020-09-24 22:55:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 22:55:39,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 22:55:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 22:55:39,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 22:55:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 22:55:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:39,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:39,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 22:55:39,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:39,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 22:55:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:55:39,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:55:39,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 22:55:39,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803390265] [2020-09-24 22:55:39,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:39,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:55:39,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967847524] [2020-09-24 22:55:39,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:55:39,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:55:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:55:39,404 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 12 states. [2020-09-24 22:55:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:40,168 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2020-09-24 22:55:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 22:55:40,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-24 22:55:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:40,174 INFO L225 Difference]: With dead ends: 155 [2020-09-24 22:55:40,174 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 22:55:40,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-09-24 22:55:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 22:55:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 90. [2020-09-24 22:55:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 22:55:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-09-24 22:55:40,189 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 61 [2020-09-24 22:55:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:40,190 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-09-24 22:55:40,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:55:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-09-24 22:55:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 22:55:40,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:40,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 22:55:40,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:40,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1161712723, now seen corresponding path program 2 times [2020-09-24 22:55:40,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:40,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993961631] [2020-09-24 22:55:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 22:55:45,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:55:45,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 22:55:45,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:45,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:55:45,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 22:55:45,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:45,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:45,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 22:55:45,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 22:55:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:55:45,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:45,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 22:55:45,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:55:45,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:45,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993961631] [2020-09-24 22:55:45,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:45,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:55:45,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342021563] [2020-09-24 22:55:45,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:55:45,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:55:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:45,409 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-09-24 22:55:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:45,699 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2020-09-24 22:55:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 22:55:45,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-24 22:55:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:45,701 INFO L225 Difference]: With dead ends: 185 [2020-09-24 22:55:45,702 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 22:55:45,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 22:55:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-09-24 22:55:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-24 22:55:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2020-09-24 22:55:45,723 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 70 [2020-09-24 22:55:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:45,723 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2020-09-24 22:55:45,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:55:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2020-09-24 22:55:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 22:55:45,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:45,727 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 22:55:45,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:45,728 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash -344437953, now seen corresponding path program 3 times [2020-09-24 22:55:45,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:45,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374142824] [2020-09-24 22:55:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:49,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:50,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:50,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 22:55:50,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:55:50,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 22:55:50,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:50,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:55:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 22:55:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:50,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:50,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:50,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:50,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:50,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 22:55:50,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:50,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 22:55:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:50,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:50,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:50,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:55:50,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:55:50,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:55:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:50,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374142824] [2020-09-24 22:55:50,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:50,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:55:50,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024858987] [2020-09-24 22:55:50,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:55:50,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:55:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:55:50,937 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 12 states. [2020-09-24 22:55:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:51,312 INFO L93 Difference]: Finished difference Result 206 states and 229 transitions. [2020-09-24 22:55:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:55:51,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 22:55:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:51,314 INFO L225 Difference]: With dead ends: 206 [2020-09-24 22:55:51,314 INFO L226 Difference]: Without dead ends: 113 [2020-09-24 22:55:51,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:55:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-24 22:55:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-09-24 22:55:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 22:55:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-09-24 22:55:51,325 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 79 [2020-09-24 22:55:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:51,326 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-09-24 22:55:51,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:55:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-09-24 22:55:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 22:55:51,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:51,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 22:55:51,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:51,328 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 380047341, now seen corresponding path program 4 times [2020-09-24 22:55:51,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:51,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803771940] [2020-09-24 22:55:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:51,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:54,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:55,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:56,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:56,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:56,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 22:55:56,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 22:55:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 22:55:56,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:55:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-09-24 22:55:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 22:55:56,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:56,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:56,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:55:56,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 22:55:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:56,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 22:55:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:56,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:56,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:55:56,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:56,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 22:55:56,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803771940] [2020-09-24 22:55:56,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:56,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 22:55:56,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785277362] [2020-09-24 22:55:56,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 22:55:56,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 22:55:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:55:56,789 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 14 states. [2020-09-24 22:55:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:58,116 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-09-24 22:55:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 22:55:58,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-09-24 22:55:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:58,118 INFO L225 Difference]: With dead ends: 146 [2020-09-24 22:55:58,118 INFO L226 Difference]: Without dead ends: 144 [2020-09-24 22:55:58,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 22:55:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-24 22:55:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2020-09-24 22:55:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-24 22:55:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-09-24 22:55:58,140 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 88 [2020-09-24 22:55:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:58,140 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-09-24 22:55:58,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 22:55:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-09-24 22:55:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 22:55:58,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:58,142 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 22:55:58,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:58,142 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash 312426909, now seen corresponding path program 5 times [2020-09-24 22:55:58,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:58,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644791490] [2020-09-24 22:55:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:58,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:58,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:59,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:03,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:03,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 22:56:03,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:56:03,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 22:56:03,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:56:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:56:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 22:56:03,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:03,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:03,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:03,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:56:03,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 22:56:03,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:03,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 22:56:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:03,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:03,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:03,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:56:03,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:03,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:56:03,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:03,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:56:03,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:03,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:56:03,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:03,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644791490] [2020-09-24 22:56:03,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:03,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 22:56:03,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757950433] [2020-09-24 22:56:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 22:56:03,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 22:56:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:56:03,417 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 16 states. [2020-09-24 22:56:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:04,030 INFO L93 Difference]: Finished difference Result 276 states and 304 transitions. [2020-09-24 22:56:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 22:56:04,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-09-24 22:56:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:04,033 INFO L225 Difference]: With dead ends: 276 [2020-09-24 22:56:04,034 INFO L226 Difference]: Without dead ends: 137 [2020-09-24 22:56:04,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-09-24 22:56:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-24 22:56:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2020-09-24 22:56:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 22:56:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-09-24 22:56:04,044 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 97 [2020-09-24 22:56:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:04,044 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-09-24 22:56:04,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 22:56:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-09-24 22:56:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 22:56:04,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:04,046 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 22:56:04,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:56:04,047 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1257469643, now seen corresponding path program 6 times [2020-09-24 22:56:04,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:04,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588864493] [2020-09-24 22:56:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:04,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:04,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:04,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:09,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:09,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-24 22:56:09,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 22:56:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:09,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:09,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:09,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:09,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:56:09,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 22:56:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:09,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:09,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 22:56:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:09,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:09,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:56:09,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:09,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:56:09,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:09,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:56:09,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:56:09,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 100 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:09,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588864493] [2020-09-24 22:56:09,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:09,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 22:56:09,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265597971] [2020-09-24 22:56:09,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 22:56:09,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 22:56:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:56:09,410 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 18 states. [2020-09-24 22:56:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:10,295 INFO L93 Difference]: Finished difference Result 334 states and 365 transitions. [2020-09-24 22:56:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 22:56:10,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 106 [2020-09-24 22:56:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:10,298 INFO L225 Difference]: With dead ends: 334 [2020-09-24 22:56:10,299 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 22:56:10,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 22:56:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 22:56:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2020-09-24 22:56:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-24 22:56:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2020-09-24 22:56:10,308 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 106 [2020-09-24 22:56:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:10,309 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2020-09-24 22:56:10,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 22:56:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2020-09-24 22:56:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 22:56:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:10,310 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-09-24 22:56:10,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:56:10,311 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1253913949, now seen corresponding path program 7 times [2020-09-24 22:56:10,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:10,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103670251] [2020-09-24 22:56:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:10,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:14,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:15,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:15,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:56:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 22:56:15,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:15,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:15,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:56:15,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 22:56:15,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:15,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 22:56:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:15,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:15,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 22:56:15,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:15,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:56:15,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:56:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:56:15,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 5 proven. 212 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-09-24 22:56:15,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103670251] [2020-09-24 22:56:15,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:15,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 22:56:15,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477866352] [2020-09-24 22:56:15,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 22:56:15,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 22:56:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:56:15,586 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand 16 states. [2020-09-24 22:56:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:16,941 INFO L93 Difference]: Finished difference Result 333 states and 367 transitions. [2020-09-24 22:56:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 22:56:16,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2020-09-24 22:56:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:16,945 INFO L225 Difference]: With dead ends: 333 [2020-09-24 22:56:16,946 INFO L226 Difference]: Without dead ends: 227 [2020-09-24 22:56:16,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=659, Invalid=2311, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 22:56:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-24 22:56:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 152. [2020-09-24 22:56:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-24 22:56:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2020-09-24 22:56:16,965 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 115 [2020-09-24 22:56:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:16,965 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2020-09-24 22:56:16,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 22:56:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2020-09-24 22:56:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 22:56:16,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:16,970 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-09-24 22:56:16,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:56:16,970 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash -789857525, now seen corresponding path program 8 times [2020-09-24 22:56:16,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:16,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308378907] [2020-09-24 22:56:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking...