/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-industry-pattern/array_ptr_partial_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:58:43,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:58:43,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:58:43,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:58:43,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:58:43,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:58:43,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:58:43,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:58:43,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:58:43,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:58:43,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:58:43,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:58:43,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:58:43,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:58:43,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:58:43,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:58:43,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:58:43,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:58:43,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:58:43,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:58:43,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:58:43,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:58:43,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:58:43,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:58:43,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:58:43,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:58:43,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:58:43,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:58:43,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:58:43,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:58:43,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:58:43,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:58:43,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:58:43,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:58:43,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:58:43,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:58:43,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:58:43,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:58:43,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:58:43,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:58:43,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:58:43,142 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 23:58:43,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:58:43,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:58:43,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:58:43,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:58:43,186 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:58:43,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:58:43,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:58:43,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:58:43,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:58:43,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:58:43,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:58:43,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:58:43,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:58:43,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:58:43,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:58:43,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:58:43,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:58:43,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:58:43,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:58:43,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:58:43,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:58:43,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:58:43,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:58:43,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:58:43,193 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:58:43,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:58:43,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:58:43,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:58:43,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:58:43,577 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:58:43,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-13 23:58:43,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0838a0a1f/51ffd87639f94514b63dbedbdadb1f98/FLAG3d00d944b [2020-10-13 23:58:44,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:58:44,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-13 23:58:44,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0838a0a1f/51ffd87639f94514b63dbedbdadb1f98/FLAG3d00d944b [2020-10-13 23:58:44,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0838a0a1f/51ffd87639f94514b63dbedbdadb1f98 [2020-10-13 23:58:44,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:58:44,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:58:44,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:58:44,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:58:44,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:58:44,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61445f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44, skipping insertion in model container [2020-10-13 23:58:44,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:58:44,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:58:44,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:58:44,664 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:58:44,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:58:44,703 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:58:44,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44 WrapperNode [2020-10-13 23:58:44,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:58:44,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:58:44,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:58:44,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:58:44,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... [2020-10-13 23:58:44,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:58:44,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:58:44,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:58:44,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:58:44,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:58:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:58:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:58:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:58:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:58:44,908 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:58:44,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:58:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:58:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:58:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:58:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:58:45,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:58:45,251 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:58:45,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:58:45 BoogieIcfgContainer [2020-10-13 23:58:45,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:58:45,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:58:45,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:58:45,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:58:45,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:58:44" (1/3) ... [2020-10-13 23:58:45,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738f3a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:58:45, skipping insertion in model container [2020-10-13 23:58:45,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:58:44" (2/3) ... [2020-10-13 23:58:45,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738f3a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:58:45, skipping insertion in model container [2020-10-13 23:58:45,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:58:45" (3/3) ... [2020-10-13 23:58:45,271 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_partial_init.i [2020-10-13 23:58:45,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:58:45,295 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:58:45,308 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:58:45,329 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:58:45,329 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:58:45,329 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:58:45,329 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:58:45,330 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:58:45,330 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:58:45,330 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:58:45,330 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:58:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:58:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:58:45,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:45,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:45,357 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-13 23:58:45,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:45,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262121739] [2020-10-13 23:58:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:58:45,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:45,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 23:58:45,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:58:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:45,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:58:45,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 23:58:45,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:45,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:45,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:45,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262121739] [2020-10-13 23:58:45,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:58:45,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:58:45,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013154967] [2020-10-13 23:58:45,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:58:45,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:58:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:58:45,936 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 23:58:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:46,046 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 23:58:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:58:46,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:58:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:46,065 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:58:46,065 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:58:46,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:58:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:58:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 23:58:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:58:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 23:58:46,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-13 23:58:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:46,109 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 23:58:46,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:58:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 23:58:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:58:46,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:46,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:46,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:58:46,111 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-13 23:58:46,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:46,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177348707] [2020-10-13 23:58:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:58:46,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:46,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-13 23:58:46,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:58:46,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:46,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:46,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:58:46,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:58:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:46,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177348707] [2020-10-13 23:58:46,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:58:46,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:58:46,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956001473] [2020-10-13 23:58:46,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:58:46,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:46,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:58:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:58:46,465 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-13 23:58:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:46,611 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 23:58:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:58:46,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:58:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:46,613 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:58:46,614 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:58:46,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 23:58:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:58:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-10-13 23:58:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:58:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 23:58:46,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2020-10-13 23:58:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:46,624 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 23:58:46,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:58:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 23:58:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:58:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:46,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:46,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:58:46,626 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:46,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-13 23:58:46,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:46,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954500007] [2020-10-13 23:58:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:47,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:47,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:58:47,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:47,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-13 23:58:47,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:47,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:47,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:58:47,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:58:47,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:58:47,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:58:47,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:47,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:47,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:47,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:58:47,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:47,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:58:47,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954500007] [2020-10-13 23:58:47,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:47,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:58:47,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593546775] [2020-10-13 23:58:47,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:58:47,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:58:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:58:47,445 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-13 23:58:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:47,708 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-13 23:58:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:58:47,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 23:58:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:47,710 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:58:47,710 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:58:47,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:58:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:58:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-13 23:58:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:58:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 23:58:47,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-13 23:58:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:47,728 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 23:58:47,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:58:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 23:58:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:58:47,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:47,730 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:47,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:58:47,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2020-10-13 23:58:47,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:47,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200031463] [2020-10-13 23:58:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:47,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:47,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:49,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:49,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:58:49,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-13 23:58:49,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:49,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:58:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:58:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:49,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:49,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:49,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:49,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:49,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:49,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:49,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:58:49,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200031463] [2020-10-13 23:58:49,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:49,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:58:49,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790283306] [2020-10-13 23:58:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:58:49,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:58:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:58:49,474 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-13 23:58:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:49,681 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-13 23:58:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:58:49,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 23:58:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:49,683 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:58:49,683 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:58:49,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:58:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:58:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-10-13 23:58:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:58:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 23:58:49,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-13 23:58:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:49,693 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 23:58:49,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:58:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 23:58:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:58:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:49,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:49,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:58:49,695 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:49,696 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2020-10-13 23:58:49,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:49,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637593932] [2020-10-13 23:58:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:49,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:49,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:52,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:52,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:58:52,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:52,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3245 [2020-10-13 23:58:52,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:52,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:52,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:58:52,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:58:52,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:53,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:53,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:53,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:53,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:53,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:58:53,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:53,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:58:53,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637593932] [2020-10-13 23:58:53,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:53,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:58:53,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868192288] [2020-10-13 23:58:53,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:58:53,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:58:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:58:53,052 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-13 23:58:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:53,406 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-13 23:58:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:58:53,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 23:58:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:53,409 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:58:53,409 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:58:53,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:58:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:58:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-10-13 23:58:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:58:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:58:53,419 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-13 23:58:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:53,419 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:58:53,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:58:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:58:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:58:53,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:53,421 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:53,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:58:53,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 4 times [2020-10-13 23:58:53,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:53,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770336954] [2020-10-13 23:58:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:58,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:58,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:58:58,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:58,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4666 [2020-10-13 23:58:58,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:58,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:58:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:58:58,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:58,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:58,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:58,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:58,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:58,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:58,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:58:58,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:58,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:58,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:58,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:58,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:58:58,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770336954] [2020-10-13 23:58:58,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:58,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:58:58,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029929353] [2020-10-13 23:58:58,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:58:58,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:58:58,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:58:58,200 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-13 23:58:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:58,604 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-13 23:58:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:58:58,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 23:58:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:58,606 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:58:58,606 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:58:58,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:58:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:58:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2020-10-13 23:58:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:58:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 23:58:58,622 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-13 23:58:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:58,623 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 23:58:58,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:58:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 23:58:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:58:58,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:58,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:58,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:58:58,628 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 5 times [2020-10-13 23:58:58,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:58,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978531483] [2020-10-13 23:58:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:58,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:03,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:03,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:59:03,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:03,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:59:03,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:03,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:59:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:59:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:59:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:03,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:03,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:03,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:03,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:03,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:03,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:03,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:03,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:03,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:03,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:03,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:59:03,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978531483] [2020-10-13 23:59:03,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:03,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:59:03,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582418093] [2020-10-13 23:59:03,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:59:03,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:59:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:59:03,740 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-13 23:59:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:04,134 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-13 23:59:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:59:04,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 23:59:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:04,136 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:59:04,136 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:59:04,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:59:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:59:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 44. [2020-10-13 23:59:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:59:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 23:59:04,151 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-13 23:59:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:04,152 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 23:59:04,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:59:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 23:59:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:59:04,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:04,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:04,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:59:04,154 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 6 times [2020-10-13 23:59:04,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:04,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618831424] [2020-10-13 23:59:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:04,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:09,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:09,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:59:09,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:09,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:59:09,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:09,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:09,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:59:09,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:09,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:59:09,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:09,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:09,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:09,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:09,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:09,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:09,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:09,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:09,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:09,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:59:09,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618831424] [2020-10-13 23:59:09,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:09,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:59:09,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242948664] [2020-10-13 23:59:09,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:59:09,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:59:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:59:09,277 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-13 23:59:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:09,734 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-13 23:59:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:59:09,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:59:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:09,736 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:59:09,736 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 23:59:09,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:59:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 23:59:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 48. [2020-10-13 23:59:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:59:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 23:59:09,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-13 23:59:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:09,745 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 23:59:09,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:59:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 23:59:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:59:09,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:09,747 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:09,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:59:09,747 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 7 times [2020-10-13 23:59:09,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:09,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065272790] [2020-10-13 23:59:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:09,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:11,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:14,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:14,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:59:14,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:14,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:59:14,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:14,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:59:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:59:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:14,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:14,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:14,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:14,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:14,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:14,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:14,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:14,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:14,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:14,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:59:14,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065272790] [2020-10-13 23:59:14,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:14,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:59:14,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233691532] [2020-10-13 23:59:14,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:59:14,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:59:14,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:59:14,880 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-13 23:59:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:15,358 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-10-13 23:59:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:59:15,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 23:59:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:15,360 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:59:15,360 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:59:15,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:59:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:59:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 52. [2020-10-13 23:59:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:59:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 23:59:15,368 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-13 23:59:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:15,369 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 23:59:15,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:59:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 23:59:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:59:15,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:15,370 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:15,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:59:15,371 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 8 times [2020-10-13 23:59:15,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:15,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478979097] [2020-10-13 23:59:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:15,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:16,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:20,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:59:20,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:59:20,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:20,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:20,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:59:20,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:59:20,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:59:20,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:20,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:20,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:20,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:20,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:20,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:20,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:59:20,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478979097] [2020-10-13 23:59:20,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:20,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:59:20,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058661479] [2020-10-13 23:59:20,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:59:20,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:59:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:59:20,557 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 9 states. [2020-10-13 23:59:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:20,976 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 23:59:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:59:20,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-13 23:59:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:20,979 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:59:20,979 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:59:20,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:59:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:59:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-13 23:59:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:59:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 23:59:21,008 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2020-10-13 23:59:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:21,009 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 23:59:21,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:59:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 23:59:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:59:21,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:21,012 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:21,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:59:21,013 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1478506813, now seen corresponding path program 1 times [2020-10-13 23:59:21,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:21,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726250124] [2020-10-13 23:59:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:21,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:26,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:26,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:59:26,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:26,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:59:26,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:26,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:59:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:59:26,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:26,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:26,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:26,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:26,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:26,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:26,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:26,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:26,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:59:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:59:26,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726250124] [2020-10-13 23:59:26,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:26,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:59:26,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397981967] [2020-10-13 23:59:26,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:59:26,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:59:26,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:59:26,171 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2020-10-13 23:59:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:26,697 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-13 23:59:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:59:26,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-13 23:59:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:26,699 INFO L225 Difference]: With dead ends: 181 [2020-10-13 23:59:26,700 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:59:26,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:59:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:59:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 62. [2020-10-13 23:59:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:59:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 23:59:26,716 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-13 23:59:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:26,716 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 23:59:26,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:59:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 23:59:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:59:26,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:26,722 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:26,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:59:26,722 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash 139631033, now seen corresponding path program 2 times [2020-10-13 23:59:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:26,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600794004] [2020-10-13 23:59:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:27,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:59:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:59:31,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:59:31,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:31,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:31,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:31,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:31,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:31,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:31,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:31,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:31,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:59:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:31,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:31,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:31,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:31,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:31,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-13 23:59:31,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600794004] [2020-10-13 23:59:31,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:31,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:59:31,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498959546] [2020-10-13 23:59:31,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:59:31,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:59:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:59:31,900 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 13 states. [2020-10-13 23:59:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:32,505 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-10-13 23:59:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:59:32,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-13 23:59:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:32,507 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:59:32,507 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:59:32,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:59:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:59:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 66. [2020-10-13 23:59:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:59:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 23:59:32,516 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-13 23:59:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:32,517 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 23:59:32,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:59:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 23:59:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:59:32,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:32,518 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:32,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:59:32,518 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1633766453, now seen corresponding path program 3 times [2020-10-13 23:59:32,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:32,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423773787] [2020-10-13 23:59:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:33,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:37,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:59:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:59:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:37,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:37,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:37,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:37,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:37,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:37,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:37,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:37,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:37,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:37,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:59:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:37,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:37,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:37,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:37,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:37,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:37,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:37,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:37,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:37,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:37,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:37,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:59:37,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423773787] [2020-10-13 23:59:37,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:37,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:59:37,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612569206] [2020-10-13 23:59:37,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:59:37,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:37,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:59:37,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:59:37,682 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 14 states. [2020-10-13 23:59:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:38,320 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-10-13 23:59:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:59:38,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-13 23:59:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:38,323 INFO L225 Difference]: With dead ends: 213 [2020-10-13 23:59:38,323 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 23:59:38,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:59:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 23:59:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 70. [2020-10-13 23:59:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:59:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 23:59:38,340 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-13 23:59:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:38,343 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 23:59:38,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:59:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 23:59:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:59:38,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:38,344 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:38,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:59:38,345 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1851216049, now seen corresponding path program 4 times [2020-10-13 23:59:38,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:38,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625281256] [2020-10-13 23:59:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:38,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:59:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:59:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:59:43,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:43,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:43,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:43,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:43,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:43,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:43,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:43,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:43,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:43,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:43,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:59:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 23:59:43,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625281256] [2020-10-13 23:59:43,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:59:43,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034018260] [2020-10-13 23:59:43,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:59:43,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:43,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:59:43,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:59:43,583 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 15 states. [2020-10-13 23:59:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:44,341 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2020-10-13 23:59:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:59:44,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-13 23:59:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:44,345 INFO L225 Difference]: With dead ends: 229 [2020-10-13 23:59:44,345 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:59:44,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:59:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:59:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 74. [2020-10-13 23:59:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:59:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 23:59:44,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-13 23:59:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:44,361 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 23:59:44,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:59:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 23:59:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:59:44,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:44,362 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:44,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:59:44,362 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1807722285, now seen corresponding path program 5 times [2020-10-13 23:59:44,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:44,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448279494] [2020-10-13 23:59:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:44,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:59:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:49,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:49,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:49,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:49,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:49,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:49,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:49,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:49,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:59:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:49,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:49,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:49,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:49,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:49,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:49,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:49,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-13 23:59:49,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448279494] [2020-10-13 23:59:49,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:49,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:59:49,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739308923] [2020-10-13 23:59:49,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:59:49,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:59:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:59:49,565 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-13 23:59:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:50,537 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2020-10-13 23:59:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:59:50,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-13 23:59:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:50,540 INFO L225 Difference]: With dead ends: 245 [2020-10-13 23:59:50,540 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 23:59:50,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:59:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 23:59:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2020-10-13 23:59:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:59:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 23:59:50,569 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-13 23:59:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:50,570 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 23:59:50,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:59:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 23:59:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:59:50,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:50,580 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:50,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:59:50,581 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1202016169, now seen corresponding path program 6 times [2020-10-13 23:59:50,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:50,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795853140] [2020-10-13 23:59:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:56,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6068 [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:56,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:59:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:59:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:56,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:56,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:56,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:56,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:56,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:56,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:56,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:59:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:56,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:56,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:56,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:56,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:56,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:56,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:59:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:56,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:59:56,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795853140] [2020-10-13 23:59:56,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:56,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:59:56,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429373624] [2020-10-13 23:59:56,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:59:56,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:59:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:59:56,884 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 17 states. [2020-10-13 23:59:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:57,793 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2020-10-13 23:59:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:59:57,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-13 23:59:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:57,796 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:59:57,796 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 23:59:57,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:59:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 23:59:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 82. [2020-10-13 23:59:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:59:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 23:59:57,806 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-13 23:59:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:57,806 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 23:59:57,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:59:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 23:59:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:59:57,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:57,808 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:57,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:59:57,808 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash 563300901, now seen corresponding path program 7 times [2020-10-13 23:59:57,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:57,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710564865] [2020-10-13 23:59:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:03,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:03,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 00:00:03,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:00:03,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5464 [2020-10-14 00:00:03,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:03,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:03,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:00:03,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:03,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 00:00:03,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:03,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:03,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:03,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:03,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:03,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:03,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:03,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:03,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:03,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:03,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 00:00:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:03,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:03,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:03,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-14 00:00:03,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710564865] [2020-10-14 00:00:03,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:03,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:00:03,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333507882] [2020-10-14 00:00:03,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:00:03,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:00:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:00:03,497 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 18 states. [2020-10-14 00:00:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:04,513 INFO L93 Difference]: Finished difference Result 277 states and 282 transitions. [2020-10-14 00:00:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 00:00:04,514 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-14 00:00:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:04,516 INFO L225 Difference]: With dead ends: 277 [2020-10-14 00:00:04,517 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 00:00:04,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:00:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 00:00:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 86. [2020-10-14 00:00:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 00:00:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-14 00:00:04,527 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-14 00:00:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:04,528 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-14 00:00:04,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:00:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-14 00:00:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 00:00:04,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:04,529 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:04,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:00:04,529 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash -896231775, now seen corresponding path program 8 times [2020-10-14 00:00:04,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:04,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185785292] [2020-10-14 00:00:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:04,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:09,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:09,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 00:00:09,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:00:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:09,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:09,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:09,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:09,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:09,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:09,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:00:09,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:09,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:09,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:00:09,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 00:00:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:09,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:09,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:09,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:09,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:09,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:09,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:00:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-14 00:00:09,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185785292] [2020-10-14 00:00:09,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:09,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 00:00:09,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902036083] [2020-10-14 00:00:09,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 00:00:09,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:09,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 00:00:09,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:00:09,900 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2020-10-14 00:00:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:10,961 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2020-10-14 00:00:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 00:00:10,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2020-10-14 00:00:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:10,964 INFO L225 Difference]: With dead ends: 293 [2020-10-14 00:00:10,964 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 00:00:10,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:00:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 00:00:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 90. [2020-10-14 00:00:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 00:00:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-14 00:00:10,978 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-14 00:00:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:10,979 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-14 00:00:10,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 00:00:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-14 00:00:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 00:00:10,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:10,980 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:10,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:00:10,980 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1161049373, now seen corresponding path program 9 times [2020-10-14 00:00:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:10,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600383816] [2020-10-14 00:00:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:11,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:23,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:23,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 00:00:23,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:00:23,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12032 [2020-10-14 00:00:23,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:23,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:00:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 00:00:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 00:00:23,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:23,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:23,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-14 00:00:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:23,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:23,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:23,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-14 00:00:23,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600383816] [2020-10-14 00:00:23,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:23,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 00:00:23,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48126574] [2020-10-14 00:00:23,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 00:00:23,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 00:00:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:00:23,267 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 20 states. [2020-10-14 00:00:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:24,443 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2020-10-14 00:00:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 00:00:24,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-14 00:00:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:24,446 INFO L225 Difference]: With dead ends: 309 [2020-10-14 00:00:24,446 INFO L226 Difference]: Without dead ends: 258 [2020-10-14 00:00:24,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 00:00:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-14 00:00:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 94. [2020-10-14 00:00:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 00:00:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 00:00:24,458 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-14 00:00:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:24,459 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 00:00:24,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 00:00:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 00:00:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 00:00:24,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:24,460 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:24,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:00:24,460 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1165829529, now seen corresponding path program 10 times [2020-10-14 00:00:24,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:24,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761348888] [2020-10-14 00:00:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:27,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:30,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:30,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 00:00:30,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:00:30,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5834 [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 00:00:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:30,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:30,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:30,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:30,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:30,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:30,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:30,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:30,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-14 00:00:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:30,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:30,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:30,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:30,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:30,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:30,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:30,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:30,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:30,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-14 00:00:30,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761348888] [2020-10-14 00:00:30,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:30,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 00:00:30,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29005579] [2020-10-14 00:00:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 00:00:30,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 00:00:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:00:30,580 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 21 states. [2020-10-14 00:00:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:31,848 INFO L93 Difference]: Finished difference Result 325 states and 330 transitions. [2020-10-14 00:00:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 00:00:31,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-14 00:00:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:31,855 INFO L225 Difference]: With dead ends: 325 [2020-10-14 00:00:31,855 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 00:00:31,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 00:00:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 00:00:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 98. [2020-10-14 00:00:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 00:00:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-14 00:00:31,877 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-14 00:00:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:31,877 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-14 00:00:31,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 00:00:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-14 00:00:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 00:00:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:31,878 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:31,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:00:31,879 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1325766635, now seen corresponding path program 11 times [2020-10-14 00:00:31,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:31,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647721993] [2020-10-14 00:00:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:31,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:38,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:38,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6578 [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 00:00:38,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:38,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 00:00:38,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:38,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:38,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:38,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:38,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:38,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:38,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:38,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:38,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-14 00:00:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:38,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:38,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:38,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:38,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-14 00:00:38,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647721993] [2020-10-14 00:00:38,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:38,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 00:00:38,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945189209] [2020-10-14 00:00:38,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 00:00:38,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:38,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 00:00:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:00:38,771 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 22 states. [2020-10-14 00:00:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:40,114 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-10-14 00:00:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 00:00:40,115 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-14 00:00:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:40,118 INFO L225 Difference]: With dead ends: 341 [2020-10-14 00:00:40,118 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 00:00:40,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 00:00:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 00:00:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 102. [2020-10-14 00:00:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 00:00:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-14 00:00:40,130 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-14 00:00:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:40,130 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-14 00:00:40,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 00:00:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-14 00:00:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 00:00:40,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:40,132 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:40,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:00:40,132 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 515308689, now seen corresponding path program 12 times [2020-10-14 00:00:40,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:40,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476728637] [2020-10-14 00:00:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:40,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:41,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:48,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:48,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 00:00:48,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:00:48,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8535 [2020-10-14 00:00:48,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:48,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 00:00:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 00:00:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:48,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:48,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:48,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:48,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-14 00:00:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:48,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-14 00:00:48,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476728637] [2020-10-14 00:00:48,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:48,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 00:00:48,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269572888] [2020-10-14 00:00:48,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 00:00:48,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 00:00:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:00:48,981 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 23 states. [2020-10-14 00:00:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:50,432 INFO L93 Difference]: Finished difference Result 357 states and 362 transitions. [2020-10-14 00:00:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 00:00:50,436 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2020-10-14 00:00:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:50,438 INFO L225 Difference]: With dead ends: 357 [2020-10-14 00:00:50,438 INFO L226 Difference]: Without dead ends: 300 [2020-10-14 00:00:50,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 00:00:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-14 00:00:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 106. [2020-10-14 00:00:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 00:00:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-14 00:00:50,452 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-14 00:00:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:50,452 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-14 00:00:50,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 00:00:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-14 00:00:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 00:00:50,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:50,453 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:50,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:00:50,454 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1463673613, now seen corresponding path program 13 times [2020-10-14 00:00:50,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:50,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646630809] [2020-10-14 00:00:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:52,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:59,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:59,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 00:00:59,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:00:59,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8905 [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 00:00:59,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:59,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:59,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:59,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:59,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:59,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:59,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:59,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-14 00:00:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:00:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-14 00:00:59,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646630809] [2020-10-14 00:00:59,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:59,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 00:00:59,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596304782] [2020-10-14 00:00:59,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 00:00:59,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 00:00:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:00:59,727 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-10-14 00:01:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:01,245 INFO L93 Difference]: Finished difference Result 373 states and 378 transitions. [2020-10-14 00:01:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 00:01:01,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-10-14 00:01:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:01,248 INFO L225 Difference]: With dead ends: 373 [2020-10-14 00:01:01,248 INFO L226 Difference]: Without dead ends: 314 [2020-10-14 00:01:01,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 00:01:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-14 00:01:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 110. [2020-10-14 00:01:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 00:01:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-14 00:01:01,263 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-14 00:01:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:01,263 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-14 00:01:01,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 00:01:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-14 00:01:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 00:01:01,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:01,265 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:01,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:01:01,265 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash -728097911, now seen corresponding path program 14 times [2020-10-14 00:01:01,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:01,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526785386] [2020-10-14 00:01:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9531 [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:10,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:01:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 00:01:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 00:01:10,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:11,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:11,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:11,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:11,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 00:01:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:11,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:11,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:11,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:11,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:11,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:11,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-14 00:01:11,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526785386] [2020-10-14 00:01:11,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:11,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:01:11,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632871401] [2020-10-14 00:01:11,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:01:11,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:01:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:01:11,178 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 25 states. [2020-10-14 00:01:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:12,865 INFO L93 Difference]: Finished difference Result 389 states and 394 transitions. [2020-10-14 00:01:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 00:01:12,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-10-14 00:01:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:12,868 INFO L225 Difference]: With dead ends: 389 [2020-10-14 00:01:12,868 INFO L226 Difference]: Without dead ends: 328 [2020-10-14 00:01:12,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 00:01:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-14 00:01:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 114. [2020-10-14 00:01:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 00:01:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-14 00:01:12,887 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-14 00:01:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:12,891 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-14 00:01:12,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:01:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-14 00:01:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 00:01:12,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:12,892 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:12,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:01:12,893 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1112974853, now seen corresponding path program 15 times [2020-10-14 00:01:12,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:12,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904179257] [2020-10-14 00:01:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:12,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 00:01:17,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 00:01:17,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:18,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:18,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:18,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-14 00:01:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:18,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:18,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:18,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:18,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:18,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:18,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:18,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:18,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:18,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:18,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-14 00:01:18,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904179257] [2020-10-14 00:01:18,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:18,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 00:01:18,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007701652] [2020-10-14 00:01:18,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 00:01:18,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 00:01:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:01:18,330 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 26 states. [2020-10-14 00:01:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:20,162 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2020-10-14 00:01:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 00:01:20,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-10-14 00:01:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:20,165 INFO L225 Difference]: With dead ends: 405 [2020-10-14 00:01:20,165 INFO L226 Difference]: Without dead ends: 342 [2020-10-14 00:01:20,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 00:01:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-14 00:01:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 118. [2020-10-14 00:01:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 00:01:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 00:01:20,188 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-14 00:01:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:20,188 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 00:01:20,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 00:01:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 00:01:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 00:01:20,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:20,189 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:20,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:01:20,190 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash -42040703, now seen corresponding path program 16 times [2020-10-14 00:01:20,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:20,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107037809] [2020-10-14 00:01:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:20,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:25,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 00:01:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 00:01:25,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:01:25,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:25,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:25,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-14 00:01:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:25,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:25,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:25,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:25,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:25,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:25,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:25,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:25,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-14 00:01:25,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107037809] [2020-10-14 00:01:25,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:25,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 00:01:25,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167640905] [2020-10-14 00:01:25,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 00:01:25,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 00:01:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:01:25,685 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 27 states. [2020-10-14 00:01:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:27,635 INFO L93 Difference]: Finished difference Result 421 states and 426 transitions. [2020-10-14 00:01:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 00:01:27,636 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 115 [2020-10-14 00:01:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:27,638 INFO L225 Difference]: With dead ends: 421 [2020-10-14 00:01:27,639 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 00:01:27,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 00:01:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 00:01:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 122. [2020-10-14 00:01:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 00:01:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-14 00:01:27,669 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-14 00:01:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:27,670 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-14 00:01:27,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 00:01:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-14 00:01:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 00:01:27,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:27,673 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:27,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 00:01:27,678 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1801670403, now seen corresponding path program 17 times [2020-10-14 00:01:27,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:27,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502915189] [2020-10-14 00:01:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:27,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:32,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:32,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 00:01:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 00:01:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 00:01:32,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:33,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:33,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:33,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:33,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:33,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:33,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-14 00:01:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:33,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:33,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:33,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-14 00:01:33,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502915189] [2020-10-14 00:01:33,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:33,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 00:01:33,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923055985] [2020-10-14 00:01:33,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 00:01:33,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 00:01:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:01:33,392 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 28 states. [2020-10-14 00:01:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:35,463 INFO L93 Difference]: Finished difference Result 437 states and 442 transitions. [2020-10-14 00:01:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 00:01:35,464 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2020-10-14 00:01:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:35,466 INFO L225 Difference]: With dead ends: 437 [2020-10-14 00:01:35,466 INFO L226 Difference]: Without dead ends: 370 [2020-10-14 00:01:35,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 00:01:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-14 00:01:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 126. [2020-10-14 00:01:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 00:01:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-14 00:01:35,487 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-14 00:01:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:35,488 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-14 00:01:35,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 00:01:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-14 00:01:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 00:01:35,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:35,489 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:35,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 00:01:35,489 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1203515769, now seen corresponding path program 18 times [2020-10-14 00:01:35,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:35,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662651780] [2020-10-14 00:01:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 00:01:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 00:01:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:40,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:40,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:40,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-14 00:01:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:40,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:40,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:40,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:40,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-10-14 00:01:40,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662651780] [2020-10-14 00:01:40,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:40,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 00:01:40,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243012131] [2020-10-14 00:01:40,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 00:01:40,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:40,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 00:01:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:01:40,978 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 29 states. [2020-10-14 00:01:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:43,115 INFO L93 Difference]: Finished difference Result 453 states and 458 transitions. [2020-10-14 00:01:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 00:01:43,116 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2020-10-14 00:01:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:43,118 INFO L225 Difference]: With dead ends: 453 [2020-10-14 00:01:43,118 INFO L226 Difference]: Without dead ends: 384 [2020-10-14 00:01:43,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 00:01:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-14 00:01:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 130. [2020-10-14 00:01:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 00:01:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-14 00:01:43,137 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-14 00:01:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:43,137 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-14 00:01:43,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 00:01:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-14 00:01:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 00:01:43,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:43,139 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:43,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 00:01:43,139 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2006449163, now seen corresponding path program 19 times [2020-10-14 00:01:43,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:43,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888270125] [2020-10-14 00:01:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:43,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:48,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:48,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 00:01:48,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:48,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:48,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:48,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:48,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:48,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-14 00:01:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:48,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:48,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-14 00:01:48,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888270125] [2020-10-14 00:01:48,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:48,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 00:01:48,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185276086] [2020-10-14 00:01:48,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 00:01:48,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 00:01:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:01:48,749 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 30 states. [2020-10-14 00:01:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:51,058 INFO L93 Difference]: Finished difference Result 469 states and 474 transitions. [2020-10-14 00:01:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 00:01:51,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 127 [2020-10-14 00:01:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:51,060 INFO L225 Difference]: With dead ends: 469 [2020-10-14 00:01:51,060 INFO L226 Difference]: Without dead ends: 398 [2020-10-14 00:01:51,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 00:01:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-14 00:01:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 134. [2020-10-14 00:01:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 00:01:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-14 00:01:51,079 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-14 00:01:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:51,079 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-14 00:01:51,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 00:01:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-14 00:01:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 00:01:51,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:51,080 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:51,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 00:01:51,081 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2041260145, now seen corresponding path program 20 times [2020-10-14 00:01:51,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:51,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538142746] [2020-10-14 00:01:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:51,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:56,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 00:01:56,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 00:01:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:56,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:56,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:56,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:56,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:56,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-14 00:01:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:56,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:56,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:56,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:01:56,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:56,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:56,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-14 00:01:56,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538142746] [2020-10-14 00:01:56,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:56,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 00:01:56,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093184270] [2020-10-14 00:01:56,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 00:01:56,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 00:01:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:01:56,707 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 31 states. [2020-10-14 00:01:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:59,226 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-10-14 00:01:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 00:01:59,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 131 [2020-10-14 00:01:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:59,228 INFO L225 Difference]: With dead ends: 485 [2020-10-14 00:01:59,228 INFO L226 Difference]: Without dead ends: 412 [2020-10-14 00:01:59,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 00:01:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-14 00:01:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 138. [2020-10-14 00:01:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 00:01:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-14 00:01:59,253 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 131 [2020-10-14 00:01:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:59,253 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-14 00:01:59,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 00:01:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-14 00:01:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 00:01:59,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:59,255 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:59,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 00:01:59,255 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1880137453, now seen corresponding path program 21 times [2020-10-14 00:01:59,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:59,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601576256] [2020-10-14 00:01:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:59,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:04,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 00:02:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:05,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:05,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:05,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:05,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:05,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:02:05,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:05,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:05,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:05,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:05,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-14 00:02:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:05,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:05,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:05,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:02:05,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:05,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-14 00:02:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601576256] [2020-10-14 00:02:05,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:05,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 00:02:05,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344772031] [2020-10-14 00:02:05,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 00:02:05,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 00:02:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 00:02:05,156 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 32 states. [2020-10-14 00:02:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:08,066 INFO L93 Difference]: Finished difference Result 501 states and 506 transitions. [2020-10-14 00:02:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 00:02:08,067 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2020-10-14 00:02:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:08,070 INFO L225 Difference]: With dead ends: 501 [2020-10-14 00:02:08,070 INFO L226 Difference]: Without dead ends: 426 [2020-10-14 00:02:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 00:02:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-14 00:02:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 142. [2020-10-14 00:02:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 00:02:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-14 00:02:08,096 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-10-14 00:02:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:08,097 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-14 00:02:08,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 00:02:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-14 00:02:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 00:02:08,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:08,098 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:08,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 00:02:08,099 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1906534249, now seen corresponding path program 22 times [2020-10-14 00:02:08,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:08,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385841748] [2020-10-14 00:02:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:08,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:13,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 00:02:13,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-14 00:02:13,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:13,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:02:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:13,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:13,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-14 00:02:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:13,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:13,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:13,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:13,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:13,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:13,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:13,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-14 00:02:13,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385841748] [2020-10-14 00:02:13,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:13,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 00:02:13,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659475752] [2020-10-14 00:02:13,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 00:02:13,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 00:02:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:02:13,866 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 33 states. [2020-10-14 00:02:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:16,920 INFO L93 Difference]: Finished difference Result 517 states and 522 transitions. [2020-10-14 00:02:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 00:02:16,921 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 139 [2020-10-14 00:02:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:16,923 INFO L225 Difference]: With dead ends: 517 [2020-10-14 00:02:16,923 INFO L226 Difference]: Without dead ends: 440 [2020-10-14 00:02:16,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 00:02:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-14 00:02:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 146. [2020-10-14 00:02:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 00:02:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-14 00:02:16,950 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 139 [2020-10-14 00:02:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:16,951 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-14 00:02:16,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 00:02:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-14 00:02:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 00:02:16,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:16,952 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:16,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 00:02:16,952 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1242660379, now seen corresponding path program 23 times [2020-10-14 00:02:16,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:16,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799286428] [2020-10-14 00:02:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:17,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:22,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5262 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 00:02:22,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:22,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-14 00:02:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:22,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:22,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:22,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-14 00:02:22,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799286428] [2020-10-14 00:02:22,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:22,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 00:02:22,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014293803] [2020-10-14 00:02:22,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 00:02:22,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:22,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 00:02:22,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 00:02:22,882 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 34 states. [2020-10-14 00:02:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:25,771 INFO L93 Difference]: Finished difference Result 533 states and 538 transitions. [2020-10-14 00:02:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 00:02:25,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 143 [2020-10-14 00:02:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:25,775 INFO L225 Difference]: With dead ends: 533 [2020-10-14 00:02:25,775 INFO L226 Difference]: Without dead ends: 454 [2020-10-14 00:02:25,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 00:02:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-14 00:02:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 150. [2020-10-14 00:02:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 00:02:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-14 00:02:25,806 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2020-10-14 00:02:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:25,806 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-14 00:02:25,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 00:02:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-14 00:02:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 00:02:25,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:25,808 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:25,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 00:02:25,808 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 637333089, now seen corresponding path program 24 times [2020-10-14 00:02:25,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:25,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965322196] [2020-10-14 00:02:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5448 [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:31,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 00:02:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 00:02:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 00:02:31,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:31,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:31,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:31,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:31,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:31,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-14 00:02:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:31,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:31,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:31,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-10-14 00:02:31,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965322196] [2020-10-14 00:02:31,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:31,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 00:02:31,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957461423] [2020-10-14 00:02:31,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 00:02:31,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 00:02:31,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:02:31,981 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 35 states.