/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:49:38,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:49:38,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:49:38,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:49:38,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:49:38,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:49:38,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:49:38,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:49:38,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:49:38,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:49:38,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:49:38,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:49:38,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:49:38,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:49:38,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:49:38,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:49:38,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:49:38,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:49:38,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:49:38,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:49:38,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:49:38,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:49:38,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:49:38,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:49:38,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:49:38,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:49:38,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:49:38,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:49:38,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:49:38,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:49:38,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:49:38,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:49:38,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:49:38,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:49:38,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:49:38,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:49:38,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:49:38,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:49:38,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:49:38,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:49:38,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:49:38,699 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 23:49:38,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:49:38,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:49:38,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:49:38,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:49:38,727 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:49:38,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:49:38,727 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:49:38,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:49:38,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:49:38,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:49:38,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:49:38,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:49:38,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:49:38,729 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:49:38,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:49:38,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:49:38,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:49:38,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:49:38,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:49:38,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:49:38,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:49:38,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:49:38,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:49:38,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:49:38,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:49:38,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:49:38,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:49:38,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:49:38,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:49:38,732 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:49:39,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:49:39,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:49:39,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:49:39,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:49:39,211 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:49:39,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 23:49:39,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba45f116/48c62e61b8f44f378a90a325b931550b/FLAGce8167745 [2020-09-24 23:49:39,841 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:49:39,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 23:49:39,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba45f116/48c62e61b8f44f378a90a325b931550b/FLAGce8167745 [2020-09-24 23:49:40,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba45f116/48c62e61b8f44f378a90a325b931550b [2020-09-24 23:49:40,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:49:40,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:49:40,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:49:40,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:49:40,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:49:40,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cc5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40, skipping insertion in model container [2020-09-24 23:49:40,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:49:40,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:49:40,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:49:40,486 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:49:40,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:49:40,533 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:49:40,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40 WrapperNode [2020-09-24 23:49:40,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:49:40,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:49:40,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:49:40,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:49:40,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (1/1) ... [2020-09-24 23:49:40,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:49:40,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:49:40,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:49:40,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:49:40,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (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 23:49:40,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:49:40,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:49:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 23:49:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 23:49:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 23:49:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:49:40,777 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-24 23:49:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 23:49:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 23:49:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:49:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 23:49:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 23:49:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 23:49:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:49:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 23:49:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:49:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:49:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:49:41,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:49:41,122 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:49:41,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:49:41 BoogieIcfgContainer [2020-09-24 23:49:41,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:49:41,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:49:41,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:49:41,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:49:41,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:49:40" (1/3) ... [2020-09-24 23:49:41,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ed0a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:49:41, skipping insertion in model container [2020-09-24 23:49:41,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:40" (2/3) ... [2020-09-24 23:49:41,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ed0a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:49:41, skipping insertion in model container [2020-09-24 23:49:41,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:49:41" (3/3) ... [2020-09-24 23:49:41,143 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-24 23:49:41,152 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:49:41,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:49:41,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:49:41,210 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:49:41,211 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:49:41,211 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:49:41,211 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:49:41,211 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:49:41,211 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:49:41,211 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:49:41,212 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:49:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-24 23:49:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 23:49:41,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:41,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:41,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-24 23:49:41,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:41,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32398709] [2020-09-24 23:49:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:41,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:42,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:42,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 23:49:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-09-24 23:49:42,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:49:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 23:49:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 23:49:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 23:49:42,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:49:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:42,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:42,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:42,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 23:49:42,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:42,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:42,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:42,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:42,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 23:49:42,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:49:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:42,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:42,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:42,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 23:49:42,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:42,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:49:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:42,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:42,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:42,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 23:49:42,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:42,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:42,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:49:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:49:42,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:49:42,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:42,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 23:49:42,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32398709] [2020-09-24 23:49:42,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:49:42,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 23:49:42,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999365564] [2020-09-24 23:49:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 23:49:42,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:49:42,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 23:49:42,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 23:49:42,451 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-24 23:49:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:49:43,410 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-24 23:49:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:49:43,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-24 23:49:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:49:43,439 INFO L225 Difference]: With dead ends: 221 [2020-09-24 23:49:43,440 INFO L226 Difference]: Without dead ends: 138 [2020-09-24 23:49:43,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-24 23:49:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-24 23:49:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-24 23:49:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 23:49:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-24 23:49:43,579 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-24 23:49:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:49:43,581 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-24 23:49:43,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 23:49:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-24 23:49:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 23:49:43,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:43,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:43,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:49:43,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-24 23:49:43,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:43,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722821921] [2020-09-24 23:49:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 23:49:46,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:49:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-09-24 23:49:46,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 23:49:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 23:49:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 23:49:46,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:46,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:49:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:46,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:49:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:46,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:49:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:46,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:46,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:49:46,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:46,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:49:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 23:49:46,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:49:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:49:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:46,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:49:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:49:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 23:49:46,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:49:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 23:49:46,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:46,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 23:49:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:46,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:46,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:49:46,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:46,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 23:49:46,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:49:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:49:46,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 23:49:46,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722821921] [2020-09-24 23:49:46,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:49:46,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 23:49:46,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37482260] [2020-09-24 23:49:46,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 23:49:46,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:49:46,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 23:49:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-24 23:49:46,751 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-24 23:49:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:49:48,387 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-24 23:49:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 23:49:48,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-24 23:49:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:49:48,391 INFO L225 Difference]: With dead ends: 170 [2020-09-24 23:49:48,391 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 23:49:48,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 23:49:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 23:49:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-24 23:49:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 23:49:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-24 23:49:48,411 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-24 23:49:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:49:48,411 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-24 23:49:48,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 23:49:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-24 23:49:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 23:49:48,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:48,414 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:48,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:49:48,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-24 23:49:48,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:48,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675806821] [2020-09-24 23:49:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:48,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 23:49:51,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:49:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3046 [2020-09-24 23:49:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 23:49:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 23:49:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 23:49:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:49:51,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:49:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:51,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:49:51,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:51,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:49:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:51,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:49:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:49:51,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:49:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:49:51,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:49:51,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:51,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 23:49:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:51,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 23:49:51,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:49:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:49:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:51,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:51,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 23:49:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:49:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:51,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 23:49:51,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675806821] [2020-09-24 23:49:51,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:49:51,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 23:49:51,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291656792] [2020-09-24 23:49:51,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 23:49:51,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:49:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 23:49:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:49:51,811 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-24 23:49:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:49:53,416 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-24 23:49:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 23:49:53,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 23:49:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:49:53,420 INFO L225 Difference]: With dead ends: 195 [2020-09-24 23:49:53,420 INFO L226 Difference]: Without dead ends: 193 [2020-09-24 23:49:53,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-24 23:49:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-24 23:49:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-24 23:49:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 23:49:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-24 23:49:53,440 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-24 23:49:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:49:53,440 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-24 23:49:53,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 23:49:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-24 23:49:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 23:49:53,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:53,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:53,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:49:53,444 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:53,444 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-24 23:49:53,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:53,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911307399] [2020-09-24 23:49:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:53,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:53,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 23:49:58,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:49:58,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 23:49:58,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:49:58,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 23:49:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 23:49:58,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:49:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:58,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:49:58,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:49:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:49:58,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:49:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:58,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:49:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:49:58,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:49:58,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:49:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:58,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 23:49:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:58,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:49:58,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:49:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:58,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:49:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:58,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:58,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:49:58,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:58,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:49:58,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:49:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:58,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 23:49:58,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911307399] [2020-09-24 23:49:58,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:49:58,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 23:49:58,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456615753] [2020-09-24 23:49:58,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 23:49:58,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:49:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 23:49:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 23:49:58,652 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 11 states. [2020-09-24 23:49:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:49:59,109 INFO L93 Difference]: Finished difference Result 244 states and 266 transitions. [2020-09-24 23:49:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:49:59,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-24 23:49:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:49:59,113 INFO L225 Difference]: With dead ends: 244 [2020-09-24 23:49:59,113 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 23:49:59,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-24 23:49:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 23:49:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-09-24 23:49:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-24 23:49:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2020-09-24 23:49:59,127 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 67 [2020-09-24 23:49:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:49:59,128 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2020-09-24 23:49:59,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 23:49:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2020-09-24 23:49:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 23:49:59,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:59,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:59,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:49:59,131 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-24 23:49:59,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:59,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518913522] [2020-09-24 23:49:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:59,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:04,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:04,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 23:50:04,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:50:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 23:50:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 23:50:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 23:50:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 23:50:04,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:50:05,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:50:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:50:05,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:50:05,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:50:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:05,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:50:05,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:50:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:05,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:50:05,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:50:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:50:05,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:50:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:50:05,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:50:05,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:05,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 23:50:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 23:50:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:05,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 23:50:05,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:05,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:05,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:50:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 23:50:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:05,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:05,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:50:05,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 23:50:05,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:50:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:50:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 23:50:05,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518913522] [2020-09-24 23:50:05,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:50:05,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 23:50:05,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244287207] [2020-09-24 23:50:05,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 23:50:05,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:50:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 23:50:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-09-24 23:50:05,939 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 29 states. [2020-09-24 23:50:07,299 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-09-24 23:50:07,457 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-09-24 23:50:07,639 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-09-24 23:50:07,815 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-09-24 23:50:07,974 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-09-24 23:50:08,140 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-09-24 23:50:08,294 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-09-24 23:50:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:50:10,273 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-09-24 23:50:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 23:50:10,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-09-24 23:50:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:50:10,277 INFO L225 Difference]: With dead ends: 171 [2020-09-24 23:50:10,277 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 23:50:10,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=486, Invalid=3296, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 23:50:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 23:50:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-09-24 23:50:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 23:50:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2020-09-24 23:50:10,309 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 79 [2020-09-24 23:50:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:50:10,310 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2020-09-24 23:50:10,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 23:50:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2020-09-24 23:50:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-24 23:50:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:50:10,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:50:10,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:50:10,317 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:50:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:50:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1486199216, now seen corresponding path program 2 times [2020-09-24 23:50:10,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:50:10,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851637787] [2020-09-24 23:50:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:50:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:10,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:11,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 23:50:15,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 23:50:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:50:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:15,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:50:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:50:15,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:15,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:50:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:50:15,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:15,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:15,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:50:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:50:15,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 23:50:15,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:15,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 23:50:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:50:15,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:15,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:15,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:50:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 23:50:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:50:15,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:15,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:15,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 23:50:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:15,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:15,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:15,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:15,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:50:15,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:50:15,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 23:50:15,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851637787] [2020-09-24 23:50:15,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:50:15,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 23:50:15,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550129117] [2020-09-24 23:50:15,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 23:50:15,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:50:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 23:50:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-24 23:50:15,883 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand 20 states. [2020-09-24 23:50:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:50:17,968 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-24 23:50:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 23:50:17,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-24 23:50:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:50:17,971 INFO L225 Difference]: With dead ends: 170 [2020-09-24 23:50:17,972 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 23:50:17,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 23:50:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 23:50:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-09-24 23:50:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-24 23:50:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 177 transitions. [2020-09-24 23:50:17,986 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 177 transitions. Word has length 94 [2020-09-24 23:50:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:50:17,987 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 177 transitions. [2020-09-24 23:50:17,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 23:50:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 177 transitions. [2020-09-24 23:50:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 23:50:17,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:50:17,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:50:17,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:50:17,990 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:50:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:50:17,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1644689056, now seen corresponding path program 1 times [2020-09-24 23:50:17,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:50:17,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102426862] [2020-09-24 23:50:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:50:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:18,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:18,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:22,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:23,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 23:50:23,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 23:50:23,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5145 [2020-09-24 23:50:23,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 23:50:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 23:50:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 23:50:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:23,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:50:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:23,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:50:23,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:50:23,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:23,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:23,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:50:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:23,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:23,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:23,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:23,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:50:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:50:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:50:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 23:50:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:23,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 23:50:23,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:23,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:50:23,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:23,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:50:23,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:23,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:50:23,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:23,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:50:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:23,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:23,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 23:50:23,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:50:23,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 23:50:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:50:23,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:25,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:27,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:50:28,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:50:28,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:50:28,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 23:50:28,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0