/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:11:40,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:11:40,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:11:40,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:11:40,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:11:40,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:11:40,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:11:40,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:11:40,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:11:40,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:11:40,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:11:40,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:11:40,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:11:40,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:11:40,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:11:40,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:11:40,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:11:40,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:11:40,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:11:40,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:11:40,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:11:40,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:11:40,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:11:40,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:11:40,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:11:40,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:11:40,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:11:40,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:11:40,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:11:40,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:11:40,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:11:40,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:11:40,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:11:40,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:11:40,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:11:40,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:11:40,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:11:40,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:11:40,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:11:40,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:11:40,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:11:40,880 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 [2020-10-13 13:11:40,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:11:40,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:11:40,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:11:40,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:11:40,925 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:11:40,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:11:40,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:11:40,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:11:40,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:11:40,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:11:40,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:11:40,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:11:40,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:11:40,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:11:40,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:11:40,928 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:11:40,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:11:40,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:11:40,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:11:40,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:11:40,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:11:40,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:11:40,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:11:40,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:11:40,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:11:40,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:11:40,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:11:40,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:11:40,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:11:40,931 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:11:41,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:11:41,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:11:41,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:11:41,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:11:41,252 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:11:41,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2020-10-13 13:11:41,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e7704a39/ccd0358199e34400969373bbf8e72360/FLAGdbaa9bcce [2020-10-13 13:11:41,753 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:11:41,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2020-10-13 13:11:41,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e7704a39/ccd0358199e34400969373bbf8e72360/FLAGdbaa9bcce [2020-10-13 13:11:42,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e7704a39/ccd0358199e34400969373bbf8e72360 [2020-10-13 13:11:42,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:11:42,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:11:42,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:11:42,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:11:42,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:11:42,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256ae262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42, skipping insertion in model container [2020-10-13 13:11:42,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:11:42,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:11:42,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:11:42,423 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:11:42,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:11:42,458 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:11:42,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42 WrapperNode [2020-10-13 13:11:42,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:11:42,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:11:42,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:11:42,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:11:42,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (1/1) ... [2020-10-13 13:11:42,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:11:42,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:11:42,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:11:42,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:11:42,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (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 [2020-10-13 13:11:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:11:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:11:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-13 13:11:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:11:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 13:11:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 13:11:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 13:11:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:11:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:11:42,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:11:42,990 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 13:11:42,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:11:42 BoogieIcfgContainer [2020-10-13 13:11:42,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:11:42,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:11:42,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:11:42,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:11:42,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:11:42" (1/3) ... [2020-10-13 13:11:42,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6301b3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:11:42, skipping insertion in model container [2020-10-13 13:11:42,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:42" (2/3) ... [2020-10-13 13:11:43,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6301b3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:11:43, skipping insertion in model container [2020-10-13 13:11:43,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:11:42" (3/3) ... [2020-10-13 13:11:43,001 INFO L109 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2020-10-13 13:11:43,010 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:11:43,017 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:11:43,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:11:43,052 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:11:43,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:11:43,053 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:11:43,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:11:43,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:11:43,053 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:11:43,054 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:11:43,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:11:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 13:11:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 13:11:43,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:43,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:43,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2020-10-13 13:11:43,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656273359] [2020-10-13 13:11:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:43,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:44,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 13:11:44,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:44,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 13:11:44,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:44,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 13:11:44,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:11:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:44,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:44,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:44,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:11:44,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:44,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:44,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:44,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:44,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:44,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:44,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:44,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:44,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:11:44,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:44,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 13:11:44,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:44,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 13:11:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:44,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:44,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:44,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:11:44,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:44,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:44,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 13:11:44,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:44,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:11:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:44,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:44,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:44,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:44,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:11:44,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:44,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:44,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 13:11:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:44,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 13:11:44,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656273359] [2020-10-13 13:11:44,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:44,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-10-13 13:11:44,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640086096] [2020-10-13 13:11:44,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 13:11:44,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 13:11:44,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 13:11:44,492 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 13:11:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:44,594 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-10-13 13:11:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 13:11:44,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 13:11:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:44,605 INFO L225 Difference]: With dead ends: 54 [2020-10-13 13:11:44,606 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 13:11:44,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 13:11:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 13:11:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 13:11:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 13:11:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 13:11:44,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2020-10-13 13:11:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:44,653 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 13:11:44,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 13:11:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 13:11:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 13:11:44,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:44,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:44,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:11:44,657 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2020-10-13 13:11:44,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:44,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907747911] [2020-10-13 13:11:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:45,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 13:11:45,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:45,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-13 13:11:45,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 13:11:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:45,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:45,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:11:45,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:45,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:45,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:45,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:11:45,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 13:11:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:45,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:45,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:45,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 13:11:45,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:45,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:45,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:11:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:45,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:45,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:45,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:45,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:11:45,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:11:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:45,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 13:11:45,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907747911] [2020-10-13 13:11:45,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:11:45,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:11:45,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492435733] [2020-10-13 13:11:45,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:45,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:45,938 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 13:11:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:46,061 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-13 13:11:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:46,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 13:11:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:46,064 INFO L225 Difference]: With dead ends: 45 [2020-10-13 13:11:46,064 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 13:11:46,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 13:11:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 13:11:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 13:11:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 13:11:46,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2020-10-13 13:11:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:46,085 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 13:11:46,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 13:11:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 13:11:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:46,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:46,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:11:46,088 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1309759401, now seen corresponding path program 1 times [2020-10-13 13:11:46,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:46,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832079616] [2020-10-13 13:11:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:48,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 13:11:48,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:11:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2665 [2020-10-13 13:11:48,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:11:48,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:48,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:48,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:48,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:48,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:11:48,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:11:48,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 13:11:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:48,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:48,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:48,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 13:11:48,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 13:11:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:48,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:48,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:48,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 13:11:48,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-13 13:11:48,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:48,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 13:11:48,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832079616] [2020-10-13 13:11:48,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:11:48,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:11:48,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048347596] [2020-10-13 13:11:48,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:48,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:48,942 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2020-10-13 13:11:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:49,048 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-13 13:11:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:49,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-13 13:11:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:49,050 INFO L225 Difference]: With dead ends: 42 [2020-10-13 13:11:49,051 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 13:11:49,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 13:11:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 13:11:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 13:11:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 13:11:49,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 38 [2020-10-13 13:11:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:49,072 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 13:11:49,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 13:11:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 13:11:49,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:49,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:49,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:11:49,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1209333671, now seen corresponding path program 1 times [2020-10-13 13:11:49,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:49,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244378309] [2020-10-13 13:11:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:49,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:49,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 13:11:53,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:11:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4372 [2020-10-13 13:11:53,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:11:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:53,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:53,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:53,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:53,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:11:53,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:53,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:11:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:53,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:53,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:53,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:53,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 13:11:53,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:53,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:53,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-13 13:11:53,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:53,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:53,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 13:11:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:53,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:53,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:53,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 13:11:53,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-13 13:11:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:11:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:53,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:53,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:53,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:53,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 13:11:53,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:53,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:53,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-13 13:11:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 13:11:53,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244378309] [2020-10-13 13:11:53,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:11:53,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:11:53,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067631118] [2020-10-13 13:11:53,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:53,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:53,598 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-13 13:11:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:53,683 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 13:11:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:53,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 13:11:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:53,685 INFO L225 Difference]: With dead ends: 50 [2020-10-13 13:11:53,685 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 13:11:53,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 13:11:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 13:11:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 13:11:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 13:11:53,699 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2020-10-13 13:11:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:53,699 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 13:11:53,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 13:11:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 13:11:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:53,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:53,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:11:53,703 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2020-10-13 13:11:53,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:53,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872833599] [2020-10-13 13:11:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:54,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:58,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 13:11:58,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:11:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:11:58,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:11:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 13:11:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:11:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:58,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:58,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:58,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:58,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:58,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:11:58,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:58,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:58,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 13:11:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:58,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:58,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:58,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 13:11:58,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:58,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 13:11:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:58,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:58,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:58,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:11:58,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:11:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:11:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:11:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:58,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:11:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:58,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:58,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:58,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 13:11:58,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:58,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 13:11:58,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-13 13:11:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:58,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 13:11:58,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872833599] [2020-10-13 13:11:58,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:58,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:11:58,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881788202] [2020-10-13 13:11:58,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:11:58,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:11:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:58,863 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-10-13 13:11:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:58,982 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 13:11:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:11:58,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-13 13:11:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:58,984 INFO L225 Difference]: With dead ends: 51 [2020-10-13 13:11:58,984 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 13:11:58,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:11:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 13:11:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 13:11:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 13:11:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 13:11:58,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2020-10-13 13:11:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:58,992 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 13:11:58,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:11:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 13:11:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 13:11:58,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:58,994 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:58,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:11:58,994 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -571391385, now seen corresponding path program 2 times [2020-10-13 13:11:58,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:58,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385088188] [2020-10-13 13:11:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:59,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:59,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:59,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:04,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 13:12:04,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:04,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:12:04,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:12:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:12:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:04,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:04,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:04,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:04,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:04,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 13:12:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:04,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:04,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:04,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 13:12:04,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:04,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 13:12:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:04,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:04,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 13:12:04,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:04,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:04,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:04,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:04,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:04,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 13:12:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:04,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:04,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:04,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:12:04,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:04,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 13:12:04,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385088188] [2020-10-13 13:12:04,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:04,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:12:04,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001605513] [2020-10-13 13:12:04,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:12:04,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:04,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:12:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:12:04,185 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-10-13 13:12:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:04,321 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-13 13:12:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:12:04,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-13 13:12:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:04,323 INFO L225 Difference]: With dead ends: 56 [2020-10-13 13:12:04,323 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 13:12:04,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:12:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 13:12:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 13:12:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 13:12:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 13:12:04,336 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 48 [2020-10-13 13:12:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:04,337 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 13:12:04,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:12:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 13:12:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 13:12:04,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:04,339 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:04,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:12:04,340 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 3 times [2020-10-13 13:12:04,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:04,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663190772] [2020-10-13 13:12:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:04,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:09,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 13:12:09,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:09,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:12:09,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:12:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:12:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:12:09,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:09,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:09,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:09,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:09,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:09,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:09,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 13:12:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:09,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:09,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:12:09,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:09,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:09,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:09,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 13:12:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:09,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:09,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:09,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 13:12:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:09,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:09,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:09,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:12:09,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:09,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 13:12:09,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663190772] [2020-10-13 13:12:09,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:09,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:12:09,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341151395] [2020-10-13 13:12:09,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:12:09,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:12:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:12:09,491 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-13 13:12:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:09,594 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 13:12:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:12:09,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-13 13:12:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:09,596 INFO L225 Difference]: With dead ends: 51 [2020-10-13 13:12:09,596 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 13:12:09,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:12:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 13:12:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 13:12:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 13:12:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 13:12:09,604 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2020-10-13 13:12:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:09,604 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 13:12:09,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:12:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 13:12:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 13:12:09,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:09,606 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:09,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:12:09,606 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1717617977, now seen corresponding path program 4 times [2020-10-13 13:12:09,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:09,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491833687] [2020-10-13 13:12:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:09,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:14,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 13:12:14,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:14,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:12:14,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:14,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:14,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:14,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:14,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:14,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:14,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:14,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:14,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:14,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:14,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:14,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 13:12:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:14,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 13:12:14,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:14,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 13:12:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:14,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:14,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:14,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:12:14,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:14,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:14,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 13:12:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:14,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:14,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:12:14,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:14,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 13:12:14,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491833687] [2020-10-13 13:12:14,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:14,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:14,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679334886] [2020-10-13 13:12:14,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:14,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:14,729 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-10-13 13:12:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:14,819 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-13 13:12:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:14,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-13 13:12:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:14,821 INFO L225 Difference]: With dead ends: 62 [2020-10-13 13:12:14,821 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 13:12:14,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 13:12:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 13:12:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 13:12:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-13 13:12:14,827 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 52 [2020-10-13 13:12:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:14,828 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-13 13:12:14,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-13 13:12:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 13:12:14,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:14,829 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:14,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:12:14,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:14,830 INFO L82 PathProgramCache]: Analyzing trace with hash 799625769, now seen corresponding path program 5 times [2020-10-13 13:12:14,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:14,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577907077] [2020-10-13 13:12:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:14,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:19,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 13:12:19,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:19,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:19,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:19,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:19,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:19,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:19,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:19,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:19,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:12:19,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:19,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 13:12:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:19,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:19,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:19,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:12:19,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:19,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:19,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:19,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:19,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:19,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 13:12:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:19,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:19,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 13:12:19,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:19,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:12:19,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:19,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:19,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:19,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:19,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 13:12:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577907077] [2020-10-13 13:12:19,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:19,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:19,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528438529] [2020-10-13 13:12:19,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:19,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:19,966 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-10-13 13:12:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:20,089 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-13 13:12:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:20,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-13 13:12:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:20,091 INFO L225 Difference]: With dead ends: 63 [2020-10-13 13:12:20,091 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 13:12:20,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 13:12:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 13:12:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 13:12:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 13:12:20,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2020-10-13 13:12:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:20,102 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 13:12:20,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 13:12:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:12:20,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:20,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:20,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:12:20,104 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1131907463, now seen corresponding path program 6 times [2020-10-13 13:12:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:20,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978926778] [2020-10-13 13:12:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:20,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:12:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:25,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:25,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:25,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:25,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:25,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 13:12:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:25,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:25,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:25,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:12:25,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:25,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 13:12:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 13:12:25,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978926778] [2020-10-13 13:12:25,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:25,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:25,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423508556] [2020-10-13 13:12:25,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:25,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:25,250 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-10-13 13:12:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:25,329 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-13 13:12:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:25,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 13:12:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:25,330 INFO L225 Difference]: With dead ends: 59 [2020-10-13 13:12:25,330 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 13:12:25,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 13:12:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 13:12:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 13:12:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 13:12:25,337 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 60 [2020-10-13 13:12:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:25,337 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 13:12:25,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 13:12:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:12:25,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:25,339 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:25,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:12:25,339 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1655752187, now seen corresponding path program 7 times [2020-10-13 13:12:25,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:25,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113045479] [2020-10-13 13:12:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:30,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 13:12:30,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:12:30,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:12:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:30,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:30,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:30,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:30,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:12:30,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:30,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 13:12:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:30,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:12:30,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:30,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 13:12:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:30,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:30,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:30,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 13:12:30,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:30,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 13:12:30,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113045479] [2020-10-13 13:12:30,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:30,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:30,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151722378] [2020-10-13 13:12:30,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:30,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:30,478 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-10-13 13:12:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:30,624 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-13 13:12:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:30,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-13 13:12:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:30,625 INFO L225 Difference]: With dead ends: 71 [2020-10-13 13:12:30,625 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 13:12:30,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:12:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 13:12:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 13:12:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 13:12:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 13:12:30,632 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 62 [2020-10-13 13:12:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:30,632 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 13:12:30,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 13:12:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 13:12:30,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:30,634 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:30,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:12:30,634 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1001257827, now seen corresponding path program 8 times [2020-10-13 13:12:30,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:30,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640672602] [2020-10-13 13:12:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:30,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:30,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:35,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 13:12:35,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:35,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:12:35,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 13:12:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:35,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:35,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:35,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 13:12:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:35,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:35,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 13:12:35,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 13:12:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:35,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 13:12:35,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640672602] [2020-10-13 13:12:35,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:35,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:35,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277475807] [2020-10-13 13:12:35,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:35,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:35,786 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2020-10-13 13:12:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:35,873 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-13 13:12:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:35,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 13:12:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:35,875 INFO L225 Difference]: With dead ends: 64 [2020-10-13 13:12:35,875 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 13:12:35,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 13:12:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 13:12:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 13:12:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-13 13:12:35,883 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 68 [2020-10-13 13:12:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:35,883 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-13 13:12:35,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-13 13:12:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 13:12:35,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:35,885 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:35,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:12:35,885 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1298518815, now seen corresponding path program 9 times [2020-10-13 13:12:35,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:35,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024492065] [2020-10-13 13:12:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:35,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:40,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:40,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 13:12:40,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:40,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 13:12:40,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:40,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:40,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:40,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:40,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:40,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:40,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:40,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:40,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:40,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:40,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:40,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:40,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:40,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:40,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:40,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:40,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:41,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:41,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 13:12:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:41,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:41,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:41,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:41,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:41,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:41,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 13:12:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:41,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:41,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:41,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:41,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-13 13:12:41,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024492065] [2020-10-13 13:12:41,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:41,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:41,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225538034] [2020-10-13 13:12:41,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:41,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:41,068 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-10-13 13:12:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:41,144 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 13:12:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:41,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-13 13:12:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:41,146 INFO L225 Difference]: With dead ends: 80 [2020-10-13 13:12:41,146 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 13:12:41,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 13:12:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 13:12:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 13:12:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 13:12:41,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 70 [2020-10-13 13:12:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:41,154 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 13:12:41,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 13:12:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 13:12:41,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:41,155 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:41,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:12:41,155 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1541017661, now seen corresponding path program 10 times [2020-10-13 13:12:41,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:41,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241798128] [2020-10-13 13:12:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:41,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:46,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 13:12:46,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:46,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5335 [2020-10-13 13:12:46,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:46,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:12:46,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:46,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:12:46,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:46,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:46,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:46,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:46,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:46,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:46,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:46,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:46,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:46,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 13:12:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:46,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:46,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:46,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 13:12:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 13:12:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:46,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 13:12:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:46,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:46,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:46,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 13:12:46,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:12:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-13 13:12:46,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241798128] [2020-10-13 13:12:46,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:46,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 13:12:46,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477730555] [2020-10-13 13:12:46,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 13:12:46,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 13:12:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:46,720 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-10-13 13:12:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:46,821 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-13 13:12:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 13:12:46,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-13 13:12:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:46,822 INFO L225 Difference]: With dead ends: 81 [2020-10-13 13:12:46,822 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 13:12:46,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 13:12:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 13:12:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 13:12:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-13 13:12:46,841 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 72 [2020-10-13 13:12:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:46,841 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-13 13:12:46,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 13:12:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-13 13:12:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 13:12:46,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:46,842 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:46,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:12:46,844 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1640792613, now seen corresponding path program 11 times [2020-10-13 13:12:46,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:46,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631316333] [2020-10-13 13:12:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:46,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:51,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 13:12:51,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:12:51,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:51,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:51,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:12:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:51,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 13:12:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:51,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:51,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:51,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 13:12:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:51,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:51,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:51,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:12:51,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:12:51,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 13:12:52,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631316333] [2020-10-13 13:12:52,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:52,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 13:12:52,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273354015] [2020-10-13 13:12:52,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 13:12:52,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 13:12:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:52,005 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 8 states. [2020-10-13 13:12:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:52,154 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-13 13:12:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 13:12:52,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-13 13:12:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:52,155 INFO L225 Difference]: With dead ends: 82 [2020-10-13 13:12:52,155 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 13:12:52,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:12:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 13:12:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 13:12:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 13:12:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 13:12:52,163 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2020-10-13 13:12:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:52,163 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 13:12:52,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 13:12:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 13:12:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 13:12:52,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:52,164 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:52,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:12:52,165 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1986573693, now seen corresponding path program 12 times [2020-10-13 13:12:52,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:52,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060857725] [2020-10-13 13:12:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:52,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:53,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:56,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:57,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:57,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 13:12:57,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 13:12:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5161 [2020-10-13 13:12:57,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 13:12:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:12:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 13:12:57,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0