/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:16,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:16,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:16,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:16,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:16,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:16,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:16,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:16,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:16,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:16,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:16,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:16,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:16,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:16,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:16,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:16,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:16,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:16,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:16,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:16,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:16,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:16,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:16,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:16,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:16,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:16,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:16,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:16,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:16,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:16,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:16,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:16,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:16,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:16,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:16,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:16,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:16,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:16,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:16,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:16,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:16,194 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 10:51:16,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:16,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:16,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:16,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:16,218 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:16,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:16,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:16,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:16,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:16,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:16,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:16,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:16,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:16,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:16,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:16,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:16,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:16,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:16,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:16,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:16,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:16,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:16,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:16,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:16,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:16,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:16,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:16,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:16,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:16,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:51:16,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:16,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:16,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:16,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:16,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:16,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-13 10:51:16,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/883b3fd07/3abe048b33134fb6970db242e0dc73de/FLAG4b3c070b2 [2020-10-13 10:51:17,137 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:17,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-13 10:51:17,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/883b3fd07/3abe048b33134fb6970db242e0dc73de/FLAG4b3c070b2 [2020-10-13 10:51:17,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/883b3fd07/3abe048b33134fb6970db242e0dc73de [2020-10-13 10:51:17,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:17,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:17,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:17,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:17,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:17,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b481d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17, skipping insertion in model container [2020-10-13 10:51:17,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:17,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:17,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:17,733 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:17,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:17,762 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:17,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17 WrapperNode [2020-10-13 10:51:17,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:17,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:17,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:17,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:17,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (1/1) ... [2020-10-13 10:51:17,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:17,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:17,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:17,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:17,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (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 10:51:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:18,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:18,175 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:51:18,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:18 BoogieIcfgContainer [2020-10-13 10:51:18,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:18,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:18,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:18,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:18,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:17" (1/3) ... [2020-10-13 10:51:18,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc92ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:18, skipping insertion in model container [2020-10-13 10:51:18,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:17" (2/3) ... [2020-10-13 10:51:18,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc92ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:18, skipping insertion in model container [2020-10-13 10:51:18,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:18" (3/3) ... [2020-10-13 10:51:18,189 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-13 10:51:18,200 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:18,208 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:18,224 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:18,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:18,271 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:18,271 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:18,271 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:18,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:18,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:18,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:18,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 10:51:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:51:18,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:18,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:18,306 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -516899263, now seen corresponding path program 1 times [2020-10-13 10:51:18,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:18,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195480374] [2020-10-13 10:51:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:51:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:51:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 10:51:18,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:18,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:18,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:18,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:18,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:18,661 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 10:51:18,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195480374] [2020-10-13 10:51:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:18,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:51:18,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48933072] [2020-10-13 10:51:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:51:18,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:51:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:18,694 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-10-13 10:51:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:18,726 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-13 10:51:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:51:18,728 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-13 10:51:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:18,738 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:51:18,738 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:51:18,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:51:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:51:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:51:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:51:18,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-13 10:51:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:18,790 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:51:18,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:51:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:51:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:51:18,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:18,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:18,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:18,792 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1990866618, now seen corresponding path program 1 times [2020-10-13 10:51:18,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:18,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159113289] [2020-10-13 10:51:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:51:18,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:18,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 10:51:18,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:18,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:51:18,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:19,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:19,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:19,067 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 10:51:19,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159113289] [2020-10-13 10:51:19,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:19,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:19,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887999098] [2020-10-13 10:51:19,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:19,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:19,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:19,081 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-13 10:51:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:19,178 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-13 10:51:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:19,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 10:51:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:19,180 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:51:19,180 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:51:19,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:51:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-13 10:51:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:51:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-13 10:51:19,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-13 10:51:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:19,187 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-13 10:51:19,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-13 10:51:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:51:19,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:19,189 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:19,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:19,189 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2007463969, now seen corresponding path program 1 times [2020-10-13 10:51:19,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:19,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739176931] [2020-10-13 10:51:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:51:19,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 10:51:19,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:51:19,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:19,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:19,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:19,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:19,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:19,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739176931] [2020-10-13 10:51:19,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:19,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:51:19,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090283315] [2020-10-13 10:51:19,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:19,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:19,371 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-13 10:51:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:19,460 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-13 10:51:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:19,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:51:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:19,462 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:51:19,463 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:51:19,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:51:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-10-13 10:51:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:51:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:51:19,469 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-13 10:51:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:19,470 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:51:19,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:51:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:51:19,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:19,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:19,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:19,472 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 407428156, now seen corresponding path program 2 times [2020-10-13 10:51:19,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:19,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274341826] [2020-10-13 10:51:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:51:19,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 10:51:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:51:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:19,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:19,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274341826] [2020-10-13 10:51:19,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:19,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:19,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762358874] [2020-10-13 10:51:19,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:19,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:19,714 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-13 10:51:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:19,819 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 10:51:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:19,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 10:51:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:19,823 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:51:19,823 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:51:19,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:51:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-10-13 10:51:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:51:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 10:51:19,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-13 10:51:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:19,830 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 10:51:19,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 10:51:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:51:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:19,831 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:19,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:19,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 371303831, now seen corresponding path program 3 times [2020-10-13 10:51:19,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:19,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593591785] [2020-10-13 10:51:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:51:19,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:19,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-13 10:51:19,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:51:19,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:20,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:20,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593591785] [2020-10-13 10:51:20,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:20,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:20,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767717768] [2020-10-13 10:51:20,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:20,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:20,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:20,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:20,018 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-13 10:51:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:20,083 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-13 10:51:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:20,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 10:51:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:20,084 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:51:20,085 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:51:20,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:51:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-10-13 10:51:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:51:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 10:51:20,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-13 10:51:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:20,091 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 10:51:20,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 10:51:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:51:20,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:20,092 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:20,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:20,093 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 15565874, now seen corresponding path program 4 times [2020-10-13 10:51:20,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:20,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603678446] [2020-10-13 10:51:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:51:20,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:51:20,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:51:20,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:20,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:20,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:20,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:20,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:20,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:20,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603678446] [2020-10-13 10:51:20,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:20,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:20,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406036171] [2020-10-13 10:51:20,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:20,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:20,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:20,305 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-13 10:51:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:20,397 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 10:51:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:20,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 10:51:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:20,399 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:51:20,399 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:51:20,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:51:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-10-13 10:51:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:51:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-13 10:51:20,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-13 10:51:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:20,407 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-13 10:51:20,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-13 10:51:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:51:20,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:20,409 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:20,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:20,409 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1748772877, now seen corresponding path program 5 times [2020-10-13 10:51:20,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:20,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828414836] [2020-10-13 10:51:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:51:20,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:51:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:20,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:20,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:20,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:20,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828414836] [2020-10-13 10:51:20,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:20,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:20,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480842135] [2020-10-13 10:51:20,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:20,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:20,634 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-13 10:51:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:20,716 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-13 10:51:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:20,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 10:51:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:20,717 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:51:20,717 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:20,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2020-10-13 10:51:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:51:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 10:51:20,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-13 10:51:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:20,724 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 10:51:20,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 10:51:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:51:20,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:20,725 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:20,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:20,725 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash 913391912, now seen corresponding path program 6 times [2020-10-13 10:51:20,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:20,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530573084] [2020-10-13 10:51:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:51:20,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 10:51:20,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:51:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:21,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:21,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:21,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:21,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530573084] [2020-10-13 10:51:21,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:21,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:21,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249955339] [2020-10-13 10:51:21,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:21,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:21,030 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-13 10:51:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:21,126 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-13 10:51:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:21,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 10:51:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:21,128 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:51:21,128 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:51:21,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:51:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2020-10-13 10:51:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:51:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 10:51:21,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-13 10:51:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:21,133 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 10:51:21,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 10:51:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:51:21,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:21,135 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:21,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:21,135 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:21,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1271168899, now seen corresponding path program 7 times [2020-10-13 10:51:21,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:21,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437598114] [2020-10-13 10:51:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:51:21,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:21,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-13 10:51:21,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:21,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:51:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:21,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:21,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:21,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:21,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:21,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437598114] [2020-10-13 10:51:21,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:21,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:51:21,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543558527] [2020-10-13 10:51:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:21,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:21,460 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-13 10:51:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:21,556 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-13 10:51:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:21,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 10:51:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:21,558 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:51:21,558 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:51:21,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:51:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2020-10-13 10:51:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:51:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 10:51:21,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-13 10:51:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:21,563 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 10:51:21,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 10:51:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:51:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:21,564 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:21,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:51:21,565 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1497469726, now seen corresponding path program 8 times [2020-10-13 10:51:21,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:21,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408516578] [2020-10-13 10:51:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:51:21,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:21,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:21,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:21,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:21,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:21,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408516578] [2020-10-13 10:51:21,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:21,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:51:21,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693196265] [2020-10-13 10:51:21,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:21,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:21,873 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-13 10:51:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:21,976 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-13 10:51:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:21,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 10:51:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:21,977 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:51:21,978 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:51:21,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:51:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2020-10-13 10:51:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:51:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 10:51:21,983 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-13 10:51:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:21,983 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 10:51:21,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 10:51:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:51:21,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:21,984 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:21,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:51:21,985 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash -70767623, now seen corresponding path program 9 times [2020-10-13 10:51:21,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:21,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548899811] [2020-10-13 10:51:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:51:22,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:22,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-13 10:51:22,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:51:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:51:22,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:22,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:22,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:22,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:22,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548899811] [2020-10-13 10:51:22,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:22,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:51:22,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728229033] [2020-10-13 10:51:22,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:51:22,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:51:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:22,378 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-13 10:51:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:22,508 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-13 10:51:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:51:22,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-13 10:51:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:22,510 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:51:22,510 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:51:22,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:51:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2020-10-13 10:51:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:51:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 10:51:22,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-13 10:51:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:22,515 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 10:51:22,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:51:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 10:51:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:51:22,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:22,516 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:22,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:51:22,517 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 386660884, now seen corresponding path program 10 times [2020-10-13 10:51:22,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:22,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585115854] [2020-10-13 10:51:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:51:22,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:22,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-13 10:51:22,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:51:22,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:23,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:23,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:23,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:23,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:23,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:23,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:23,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:23,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:23,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:23,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585115854] [2020-10-13 10:51:23,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:23,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:23,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667528290] [2020-10-13 10:51:23,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:23,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:23,062 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-13 10:51:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:23,188 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-13 10:51:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:23,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-13 10:51:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:23,190 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:51:23,190 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:51:23,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:51:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:51:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2020-10-13 10:51:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:51:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 10:51:23,195 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-13 10:51:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:23,195 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 10:51:23,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 10:51:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:51:23,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:23,196 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:23,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:51:23,197 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1888791919, now seen corresponding path program 11 times [2020-10-13 10:51:23,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:23,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448177718] [2020-10-13 10:51:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:23,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:23,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:51:23,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:23,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-13 10:51:23,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:51:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:51:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:23,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:23,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:23,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:23,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:23,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:23,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:23,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448177718] [2020-10-13 10:51:23,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:23,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:51:23,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002540419] [2020-10-13 10:51:23,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:51:23,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:51:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:51:23,638 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-13 10:51:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:23,773 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-13 10:51:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:51:23,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 10:51:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:23,775 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:51:23,775 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:51:23,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:51:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2020-10-13 10:51:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:51:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 10:51:23,780 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-13 10:51:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:23,780 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 10:51:23,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:51:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 10:51:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:51:23,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:23,782 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:23,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:51:23,782 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1967262198, now seen corresponding path program 12 times [2020-10-13 10:51:23,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:23,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914886937] [2020-10-13 10:51:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:24,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:51:24,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-13 10:51:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:51:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:51:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:24,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:24,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:24,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:24,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:24,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:24,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:24,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914886937] [2020-10-13 10:51:24,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:24,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:51:24,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81373138] [2020-10-13 10:51:24,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:51:24,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:51:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:24,498 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-13 10:51:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:24,643 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-13 10:51:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:51:24,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 10:51:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:24,645 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:51:24,645 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:51:24,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:51:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:51:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2020-10-13 10:51:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:51:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 10:51:24,650 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-13 10:51:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 10:51:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:51:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 10:51:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:51:24,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:24,651 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:24,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:51:24,652 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1078492187, now seen corresponding path program 13 times [2020-10-13 10:51:24,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:24,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246227985] [2020-10-13 10:51:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:24,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:25,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:25,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:51:25,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:25,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-13 10:51:25,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:51:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:51:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:25,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:25,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:25,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:25,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:25,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:25,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:25,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:25,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246227985] [2020-10-13 10:51:25,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:25,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:51:25,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232010172] [2020-10-13 10:51:25,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:51:25,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:51:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:51:25,410 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-13 10:51:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:25,546 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-10-13 10:51:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:51:25,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-13 10:51:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:25,548 INFO L225 Difference]: With dead ends: 93 [2020-10-13 10:51:25,548 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:51:25,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:51:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2020-10-13 10:51:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:51:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 10:51:25,553 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-13 10:51:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:25,553 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 10:51:25,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:51:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 10:51:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:51:25,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:25,554 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:25,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:51:25,555 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1669003520, now seen corresponding path program 14 times [2020-10-13 10:51:25,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:25,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77749740] [2020-10-13 10:51:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:26,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:26,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:51:26,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:26,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-13 10:51:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:51:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:51:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:26,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:26,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:26,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:26,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:26,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:26,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:26,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77749740] [2020-10-13 10:51:26,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:26,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:51:26,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029090521] [2020-10-13 10:51:26,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:51:26,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:51:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:26,469 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-13 10:51:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:26,679 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-13 10:51:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:51:26,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-13 10:51:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:26,681 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:51:26,681 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:51:26,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:51:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:51:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2020-10-13 10:51:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:51:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 10:51:26,696 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-13 10:51:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:26,700 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 10:51:26,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:51:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 10:51:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:51:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:26,701 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:26,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:51:26,702 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2080255835, now seen corresponding path program 15 times [2020-10-13 10:51:26,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:26,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385734122] [2020-10-13 10:51:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:26,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:27,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:27,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:51:27,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-13 10:51:27,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:27,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:51:27,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:51:27,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:27,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:27,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:27,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:27,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:27,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:27,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:27,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:27,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385734122] [2020-10-13 10:51:27,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:27,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:51:27,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206574667] [2020-10-13 10:51:27,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:51:27,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:51:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:51:27,530 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-13 10:51:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:27,689 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-13 10:51:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:51:27,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-13 10:51:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:27,691 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:51:27,691 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:51:27,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:51:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:51:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2020-10-13 10:51:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:51:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 10:51:27,697 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-13 10:51:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:27,697 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 10:51:27,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:51:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 10:51:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:51:27,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:27,699 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:27,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:51:27,699 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1640934646, now seen corresponding path program 16 times [2020-10-13 10:51:27,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:27,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848178613] [2020-10-13 10:51:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:28,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:28,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:51:28,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:28,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-13 10:51:28,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:51:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:51:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:28,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:28,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:28,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:28,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:28,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848178613] [2020-10-13 10:51:28,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:28,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:51:28,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143173776] [2020-10-13 10:51:28,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:51:28,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:51:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:51:28,657 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-13 10:51:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:28,839 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 10:51:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:51:28,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-13 10:51:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:28,840 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:51:28,840 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:51:28,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:51:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:51:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2020-10-13 10:51:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:51:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 10:51:28,852 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-13 10:51:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:28,852 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 10:51:28,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:51:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 10:51:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:51:28,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:28,853 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:28,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:51:28,854 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 360067025, now seen corresponding path program 17 times [2020-10-13 10:51:28,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:28,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700579511] [2020-10-13 10:51:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:29,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:29,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:51:29,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-13 10:51:29,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:29,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:51:29,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:29,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:51:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:29,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:29,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:29,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:29,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:29,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:29,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:29,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:29,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:29,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700579511] [2020-10-13 10:51:29,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:29,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:51:29,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237788123] [2020-10-13 10:51:29,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:51:29,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:51:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:51:29,876 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-13 10:51:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:30,043 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-10-13 10:51:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:51:30,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 10:51:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:30,045 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:51:30,045 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:51:30,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:51:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:51:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 53. [2020-10-13 10:51:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:51:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-13 10:51:30,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-13 10:51:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:30,057 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-13 10:51:30,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:51:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-13 10:51:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:51:30,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:30,058 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:30,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:51:30,059 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2101897196, now seen corresponding path program 18 times [2020-10-13 10:51:30,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:30,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822641105] [2020-10-13 10:51:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:30,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:30,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:51:30,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:51:30,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:30,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:30,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:30,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:30,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:30,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822641105] [2020-10-13 10:51:30,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:30,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:51:30,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746438717] [2020-10-13 10:51:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:51:30,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:51:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:51:30,980 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-13 10:51:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:31,157 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-10-13 10:51:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:51:31,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 10:51:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:31,158 INFO L225 Difference]: With dead ends: 118 [2020-10-13 10:51:31,158 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:51:31,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:51:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:51:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 55. [2020-10-13 10:51:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:51:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 10:51:31,162 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-13 10:51:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:31,162 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 10:51:31,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:51:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 10:51:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:51:31,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:31,163 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:31,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:51:31,164 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash 963446087, now seen corresponding path program 19 times [2020-10-13 10:51:31,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:31,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629743142] [2020-10-13 10:51:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:31,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:31,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:31,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:51:31,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 10:51:31,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:51:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:51:31,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:32,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:32,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:32,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:32,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:32,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:32,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629743142] [2020-10-13 10:51:32,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:32,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:51:32,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086163423] [2020-10-13 10:51:32,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:51:32,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:51:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:51:32,059 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-13 10:51:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:32,249 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-13 10:51:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:51:32,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 10:51:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:32,250 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:51:32,250 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:51:32,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:51:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:51:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2020-10-13 10:51:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:51:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 10:51:32,255 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 10:51:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:32,255 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 10:51:32,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:51:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 10:51:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:51:32,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:32,256 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:32,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:51:32,256 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:32,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2128590818, now seen corresponding path program 20 times [2020-10-13 10:51:32,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:32,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613295578] [2020-10-13 10:51:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:32,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:32,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:51:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-13 10:51:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:51:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:51:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:33,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:33,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:33,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:33,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:33,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:33,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613295578] [2020-10-13 10:51:33,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:33,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:51:33,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978424193] [2020-10-13 10:51:33,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:51:33,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:33,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:51:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:51:33,357 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-13 10:51:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:33,562 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-13 10:51:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:51:33,563 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 10:51:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:33,564 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:51:33,564 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:51:33,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:51:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:51:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-10-13 10:51:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:51:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 10:51:33,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-13 10:51:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:33,568 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 10:51:33,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:51:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 10:51:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:51:33,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:33,569 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:33,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:51:33,569 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash 846213053, now seen corresponding path program 21 times [2020-10-13 10:51:33,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:33,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424638894] [2020-10-13 10:51:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:51:34,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-13 10:51:34,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:51:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:34,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:51:34,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:34,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:34,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:34,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424638894] [2020-10-13 10:51:34,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:34,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:51:34,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871460974] [2020-10-13 10:51:34,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:51:34,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:51:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:51:34,778 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-13 10:51:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:34,986 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-13 10:51:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:51:34,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 10:51:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:34,988 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:51:34,988 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 10:51:34,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:51:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 10:51:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 61. [2020-10-13 10:51:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:51:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 10:51:34,992 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-13 10:51:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:34,992 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 10:51:34,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:51:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 10:51:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:51:34,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:34,993 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:34,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:51:34,994 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1136794840, now seen corresponding path program 22 times [2020-10-13 10:51:34,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:34,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537182835] [2020-10-13 10:51:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:51:35,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:35,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:51:35,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:36,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:36,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:36,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:36,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537182835] [2020-10-13 10:51:36,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:36,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:51:36,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86737935] [2020-10-13 10:51:36,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:51:36,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:51:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:51:36,310 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-13 10:51:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:36,502 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2020-10-13 10:51:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:51:36,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 10:51:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:36,504 INFO L225 Difference]: With dead ends: 138 [2020-10-13 10:51:36,504 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 10:51:36,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:51:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 10:51:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 63. [2020-10-13 10:51:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:51:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-13 10:51:36,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-13 10:51:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:36,508 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-13 10:51:36,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:51:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-13 10:51:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:51:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:36,509 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:36,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:51:36,510 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1213017907, now seen corresponding path program 23 times [2020-10-13 10:51:36,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:36,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81869020] [2020-10-13 10:51:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:36,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:37,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:51:37,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:37,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:51:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:37,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:37,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:37,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:37,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:37,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81869020] [2020-10-13 10:51:37,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:37,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:51:37,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704412477] [2020-10-13 10:51:37,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:51:37,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:51:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:51:37,481 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-13 10:51:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:37,714 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2020-10-13 10:51:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:51:37,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 10:51:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:37,715 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:51:37,715 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:51:37,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:51:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:51:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 65. [2020-10-13 10:51:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:51:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-13 10:51:37,721 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-13 10:51:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:37,722 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-13 10:51:37,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:51:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-13 10:51:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:51:37,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:37,723 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:37,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:51:37,723 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:37,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1448941262, now seen corresponding path program 24 times [2020-10-13 10:51:37,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:37,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842938511] [2020-10-13 10:51:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:51:39,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-13 10:51:39,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:51:39,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:39,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:51:39,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:39,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:39,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:39,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842938511] [2020-10-13 10:51:39,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:39,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:51:39,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206080101] [2020-10-13 10:51:39,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:51:39,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:51:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:51:39,440 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-13 10:51:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:39,675 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2020-10-13 10:51:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:51:39,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 10:51:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:39,677 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:51:39,677 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:51:39,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:51:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:51:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2020-10-13 10:51:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:51:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 10:51:39,682 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-13 10:51:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:39,682 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 10:51:39,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:51:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 10:51:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:51:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:39,683 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:39,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:51:39,683 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash 538018729, now seen corresponding path program 25 times [2020-10-13 10:51:39,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:39,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946533725] [2020-10-13 10:51:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:51:40,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-13 10:51:40,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:51:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:51:40,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:41,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:41,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:41,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946533725] [2020-10-13 10:51:41,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:41,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:51:41,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887984387] [2020-10-13 10:51:41,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:51:41,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:51:41,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:51:41,122 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-13 10:51:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,479 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2020-10-13 10:51:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:51:41,479 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 10:51:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,481 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:51:41,481 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 10:51:41,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:51:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 10:51:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 69. [2020-10-13 10:51:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:51:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-13 10:51:41,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-13 10:51:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,494 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-13 10:51:41,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:51:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-13 10:51:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:51:41,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,496 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:51:41,496 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1314792900, now seen corresponding path program 26 times [2020-10-13 10:51:41,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689749660] [2020-10-13 10:51:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:51:42,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-13 10:51:42,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:51:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:51:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:42,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:51:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:42,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689749660] [2020-10-13 10:51:42,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:51:42,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165040896] [2020-10-13 10:51:42,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:51:42,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:51:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:51:42,993 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-13 10:51:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,242 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2020-10-13 10:51:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:51:43,243 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 10:51:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,244 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:51:43,244 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:51:43,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:51:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:51:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 71. [2020-10-13 10:51:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:51:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-13 10:51:43,247 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-13 10:51:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,248 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-13 10:51:43,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:51:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-13 10:51:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:51:43,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,249 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:51:43,249 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 470461727, now seen corresponding path program 27 times [2020-10-13 10:51:43,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511318968] [2020-10-13 10:51:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:51:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:44,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:44,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511318968] [2020-10-13 10:51:44,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:51:44,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790612194] [2020-10-13 10:51:44,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:51:44,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:51:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:51:44,611 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-13 10:51:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,899 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2020-10-13 10:51:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:51:44,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-13 10:51:44,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,902 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:51:44,902 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:51:44,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:51:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:51:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 73. [2020-10-13 10:51:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:51:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 10:51:44,906 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-13 10:51:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,906 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 10:51:44,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:51:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 10:51:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:51:44,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,907 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:51:44,907 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,907 INFO L82 PathProgramCache]: Analyzing trace with hash 817023418, now seen corresponding path program 28 times [2020-10-13 10:51:44,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616269810] [2020-10-13 10:51:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:51:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:51:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:46,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:46,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:46,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616269810] [2020-10-13 10:51:46,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:46,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:51:46,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943991167] [2020-10-13 10:51:46,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:51:46,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:51:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:51:46,521 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-13 10:51:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:46,856 INFO L93 Difference]: Finished difference Result 168 states and 198 transitions. [2020-10-13 10:51:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:51:46,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-13 10:51:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:46,858 INFO L225 Difference]: With dead ends: 168 [2020-10-13 10:51:46,858 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 10:51:46,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:51:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 10:51:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 75. [2020-10-13 10:51:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:51:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-13 10:51:46,865 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-13 10:51:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:46,866 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-13 10:51:46,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:51:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-13 10:51:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:51:46,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:46,870 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:46,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:51:46,870 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1144640619, now seen corresponding path program 29 times [2020-10-13 10:51:46,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:46,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71355111] [2020-10-13 10:51:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:51:48,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-13 10:51:48,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:51:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:48,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:48,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:48,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71355111] [2020-10-13 10:51:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:48,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:51:48,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553672399] [2020-10-13 10:51:48,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:51:48,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:48,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:51:48,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:51:48,826 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-13 10:51:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:49,187 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2020-10-13 10:51:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:51:49,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-13 10:51:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:49,189 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:51:49,189 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:51:49,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:51:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:51:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2020-10-13 10:51:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:51:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-13 10:51:49,193 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-13 10:51:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:49,193 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-13 10:51:49,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:51:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-13 10:51:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:51:49,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:49,194 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:49,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:51:49,195 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash -813137232, now seen corresponding path program 30 times [2020-10-13 10:51:49,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:49,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095648514] [2020-10-13 10:51:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:51:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:50,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:50,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:50,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:50,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095648514] [2020-10-13 10:51:50,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:50,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:51:50,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982056449] [2020-10-13 10:51:50,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:51:50,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:51:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:51:50,567 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-13 10:51:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:50,917 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-10-13 10:51:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:51:50,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-13 10:51:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:50,920 INFO L225 Difference]: With dead ends: 178 [2020-10-13 10:51:50,920 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 10:51:50,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:51:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 10:51:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 79. [2020-10-13 10:51:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:51:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 10:51:50,924 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-13 10:51:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:50,925 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 10:51:50,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:51:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 10:51:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:51:50,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:50,926 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:50,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:51:50,926 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash -65962229, now seen corresponding path program 31 times [2020-10-13 10:51:50,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:50,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246077946] [2020-10-13 10:51:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:51,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:51:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:52,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:52,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:52,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:52,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246077946] [2020-10-13 10:51:52,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:52,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:51:52,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895314156] [2020-10-13 10:51:52,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:51:52,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:51:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:51:52,432 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-13 10:51:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:52,741 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2020-10-13 10:51:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:51:52,741 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-13 10:51:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:52,743 INFO L225 Difference]: With dead ends: 183 [2020-10-13 10:51:52,743 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 10:51:52,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:51:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 10:51:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 81. [2020-10-13 10:51:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:51:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 10:51:52,747 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-13 10:51:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:52,748 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 10:51:52,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:51:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 10:51:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:51:52,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:52,749 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:52,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:51:52,749 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash 709677222, now seen corresponding path program 32 times [2020-10-13 10:51:52,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:52,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968094103] [2020-10-13 10:51:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:51:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:51:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:54,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:54,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:54,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968094103] [2020-10-13 10:51:54,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:54,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:51:54,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113621187] [2020-10-13 10:51:54,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:51:54,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:54,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:51:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:51:54,129 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-13 10:51:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:54,440 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-10-13 10:51:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:51:54,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-13 10:51:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:54,442 INFO L225 Difference]: With dead ends: 188 [2020-10-13 10:51:54,443 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 10:51:54,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:51:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 10:51:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 83. [2020-10-13 10:51:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:51:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-13 10:51:54,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-13 10:51:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:54,449 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-13 10:51:54,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:51:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-13 10:51:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:51:54,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:54,450 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:54,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:51:54,450 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1225119871, now seen corresponding path program 33 times [2020-10-13 10:51:54,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:54,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575343724] [2020-10-13 10:51:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:55,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:55,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:51:55,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-10-13 10:51:55,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:51:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:51:55,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:56,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:56,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:56,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575343724] [2020-10-13 10:51:56,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:56,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:51:56,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378249378] [2020-10-13 10:51:56,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:51:56,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:51:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:51:56,431 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-13 10:51:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:56,778 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2020-10-13 10:51:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:51:56,779 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-13 10:51:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:56,781 INFO L225 Difference]: With dead ends: 193 [2020-10-13 10:51:56,781 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 10:51:56,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:51:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 10:51:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2020-10-13 10:51:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:51:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 10:51:56,786 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-13 10:51:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:56,786 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 10:51:56,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:51:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 10:51:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:51:56,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:56,787 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:56,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:51:56,788 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash -844287076, now seen corresponding path program 34 times [2020-10-13 10:51:56,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:56,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459112199] [2020-10-13 10:51:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 10:51:57,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:58,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:58,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:58,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:58,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:58,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:58,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459112199] [2020-10-13 10:51:58,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:58,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:51:58,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294425850] [2020-10-13 10:51:58,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:51:58,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:51:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:51:58,272 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-13 10:51:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:58,666 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2020-10-13 10:51:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:51:58,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-13 10:51:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:58,667 INFO L225 Difference]: With dead ends: 198 [2020-10-13 10:51:58,667 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 10:51:58,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:51:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 10:51:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 87. [2020-10-13 10:51:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:51:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-13 10:51:58,672 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-13 10:51:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:58,672 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-13 10:51:58,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:51:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-13 10:51:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 10:51:58,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:58,673 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:58,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:51:58,673 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 63808759, now seen corresponding path program 35 times [2020-10-13 10:51:58,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:58,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597856701] [2020-10-13 10:51:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1480 [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:52:00,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 10:52:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:00,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:00,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:00,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:00,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597856701] [2020-10-13 10:52:00,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:00,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:52:00,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250472282] [2020-10-13 10:52:00,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:52:00,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:52:00,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:52:00,975 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-13 10:52:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:01,356 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2020-10-13 10:52:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:52:01,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-13 10:52:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:01,358 INFO L225 Difference]: With dead ends: 203 [2020-10-13 10:52:01,359 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 10:52:01,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:52:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 10:52:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 89. [2020-10-13 10:52:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:52:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-13 10:52:01,363 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-13 10:52:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:01,363 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-13 10:52:01,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:52:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-13 10:52:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:52:01,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:01,365 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:01,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:52:01,365 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 865545106, now seen corresponding path program 36 times [2020-10-13 10:52:01,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:01,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986444031] [2020-10-13 10:52:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:01,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:01,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:52:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:52:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:03,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:03,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:03,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:03,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:03,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986444031] [2020-10-13 10:52:03,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:03,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:52:03,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23434011] [2020-10-13 10:52:03,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:52:03,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:52:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:52:03,578 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-13 10:52:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:03,965 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2020-10-13 10:52:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:52:03,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-13 10:52:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:03,967 INFO L225 Difference]: With dead ends: 208 [2020-10-13 10:52:03,967 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 10:52:03,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:52:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 10:52:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 91. [2020-10-13 10:52:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:52:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 10:52:03,974 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-13 10:52:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:03,974 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 10:52:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:52:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 10:52:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:52:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:03,975 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:03,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:52:03,975 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1759938707, now seen corresponding path program 37 times [2020-10-13 10:52:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:03,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531891138] [2020-10-13 10:52:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:04,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:05,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:52:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-13 10:52:05,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:52:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 10:52:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:06,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:06,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:06,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531891138] [2020-10-13 10:52:06,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:06,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:52:06,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857756293] [2020-10-13 10:52:06,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:52:06,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:52:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:52:06,073 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-13 10:52:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:06,454 INFO L93 Difference]: Finished difference Result 213 states and 252 transitions. [2020-10-13 10:52:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:52:06,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-13 10:52:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:06,457 INFO L225 Difference]: With dead ends: 213 [2020-10-13 10:52:06,457 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 10:52:06,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:52:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 10:52:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 93. [2020-10-13 10:52:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:52:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-13 10:52:06,463 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-13 10:52:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:06,464 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-13 10:52:06,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:52:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-13 10:52:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:52:06,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:06,465 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:06,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:52:06,465 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash 590887048, now seen corresponding path program 38 times [2020-10-13 10:52:06,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:06,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712302121] [2020-10-13 10:52:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:07,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:52:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 10:52:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:08,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:08,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712302121] [2020-10-13 10:52:08,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:08,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:52:08,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137547710] [2020-10-13 10:52:08,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:52:08,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:52:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:52:08,753 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-13 10:52:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:09,232 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2020-10-13 10:52:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:52:09,232 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-13 10:52:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:09,234 INFO L225 Difference]: With dead ends: 218 [2020-10-13 10:52:09,235 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 10:52:09,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:52:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 10:52:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 95. [2020-10-13 10:52:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:52:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-13 10:52:09,241 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-13 10:52:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:09,241 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-13 10:52:09,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:52:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-13 10:52:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:52:09,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:09,243 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:09,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:52:09,243 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 581639907, now seen corresponding path program 39 times [2020-10-13 10:52:09,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:09,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564372215] [2020-10-13 10:52:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 10:52:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:10,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:10,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:10,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:10,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:10,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:10,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:10,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:10,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:10,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:10,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564372215] [2020-10-13 10:52:10,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:10,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:52:10,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953574018] [2020-10-13 10:52:10,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:52:10,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:52:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:52:10,959 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-13 10:52:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:11,378 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2020-10-13 10:52:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:52:11,378 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-13 10:52:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:11,380 INFO L225 Difference]: With dead ends: 223 [2020-10-13 10:52:11,380 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:52:11,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:52:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:52:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 97. [2020-10-13 10:52:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:52:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-13 10:52:11,385 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-13 10:52:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:11,386 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-13 10:52:11,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:52:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-13 10:52:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:52:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:11,387 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:11,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:52:11,387 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash 285071998, now seen corresponding path program 40 times [2020-10-13 10:52:11,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:11,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696362921] [2020-10-13 10:52:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 10:52:12,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:13,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:13,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:13,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:14,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:14,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:14,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696362921] [2020-10-13 10:52:14,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:14,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:52:14,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416543696] [2020-10-13 10:52:14,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:52:14,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:14,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:52:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:52:14,011 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-13 10:52:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:14,631 INFO L93 Difference]: Finished difference Result 228 states and 270 transitions. [2020-10-13 10:52:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:52:14,632 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-13 10:52:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:14,634 INFO L225 Difference]: With dead ends: 228 [2020-10-13 10:52:14,634 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 10:52:14,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:52:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 10:52:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 99. [2020-10-13 10:52:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:52:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-13 10:52:14,642 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-13 10:52:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:14,643 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-13 10:52:14,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:52:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-13 10:52:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 10:52:14,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:14,645 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:14,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:52:14,646 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1248847015, now seen corresponding path program 41 times [2020-10-13 10:52:14,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:14,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397200121] [2020-10-13 10:52:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:14,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:16,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 10:52:16,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:17,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:17,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:17,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:17,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:17,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:17,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:17,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:17,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:17,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:17,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397200121] [2020-10-13 10:52:17,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:17,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:52:17,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440566211] [2020-10-13 10:52:17,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:52:17,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:52:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:52:17,595 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-13 10:52:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:18,082 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2020-10-13 10:52:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:52:18,082 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-13 10:52:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:18,084 INFO L225 Difference]: With dead ends: 233 [2020-10-13 10:52:18,084 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 10:52:18,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:52:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 10:52:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 101. [2020-10-13 10:52:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:52:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-13 10:52:18,090 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-13 10:52:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:18,090 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-13 10:52:18,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:52:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-13 10:52:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:52:18,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:18,091 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:18,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:52:18,092 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2123731316, now seen corresponding path program 42 times [2020-10-13 10:52:18,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:18,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402196433] [2020-10-13 10:52:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:19,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:19,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 10:52:19,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:19,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-10-13 10:52:19,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:19,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:52:19,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:19,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 10:52:19,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:20,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:20,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:20,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402196433] [2020-10-13 10:52:20,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:20,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:52:20,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550663105] [2020-10-13 10:52:20,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:52:20,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:52:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:52:20,326 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-13 10:52:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:20,784 INFO L93 Difference]: Finished difference Result 238 states and 282 transitions. [2020-10-13 10:52:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:52:20,784 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-13 10:52:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:20,786 INFO L225 Difference]: With dead ends: 238 [2020-10-13 10:52:20,786 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 10:52:20,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:52:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 10:52:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 103. [2020-10-13 10:52:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:52:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-13 10:52:20,789 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-13 10:52:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:20,789 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-13 10:52:20,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:52:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-13 10:52:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:52:20,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:20,790 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:20,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:52:20,790 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash 471198927, now seen corresponding path program 43 times [2020-10-13 10:52:20,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:20,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036566030] [2020-10-13 10:52:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1656 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 10:52:22,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:23,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036566030] [2020-10-13 10:52:23,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:23,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:52:23,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325574449] [2020-10-13 10:52:23,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:52:23,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:52:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:52:23,618 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-13 10:52:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:24,069 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2020-10-13 10:52:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:52:24,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-13 10:52:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:24,072 INFO L225 Difference]: With dead ends: 243 [2020-10-13 10:52:24,072 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 10:52:24,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:52:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 10:52:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 105. [2020-10-13 10:52:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:52:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-13 10:52:24,077 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-13 10:52:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:24,077 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-13 10:52:24,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:52:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-13 10:52:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:52:24,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:24,078 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:24,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:52:24,078 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1525472618, now seen corresponding path program 44 times [2020-10-13 10:52:24,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:24,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454534446] [2020-10-13 10:52:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:24,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:52:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:52:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:26,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:26,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:26,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454534446] [2020-10-13 10:52:26,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:26,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:52:26,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313586462] [2020-10-13 10:52:26,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:52:26,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:26,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:52:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:52:26,313 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-13 10:52:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:26,852 INFO L93 Difference]: Finished difference Result 248 states and 294 transitions. [2020-10-13 10:52:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:52:26,852 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-13 10:52:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:26,855 INFO L225 Difference]: With dead ends: 248 [2020-10-13 10:52:26,855 INFO L226 Difference]: Without dead ends: 242 [2020-10-13 10:52:26,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:52:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-13 10:52:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 107. [2020-10-13 10:52:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:52:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-13 10:52:26,861 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-13 10:52:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:26,861 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-13 10:52:26,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:52:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-13 10:52:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:52:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:26,862 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:26,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:52:26,862 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1070207813, now seen corresponding path program 45 times [2020-10-13 10:52:26,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:26,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046274086] [2020-10-13 10:52:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:28,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2055 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:52:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:30,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:30,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:30,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:30,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:30,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:30,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046274086] [2020-10-13 10:52:30,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:30,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:52:30,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175957618] [2020-10-13 10:52:30,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:52:30,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:52:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:52:30,179 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 50 states. [2020-10-13 10:52:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:30,682 INFO L93 Difference]: Finished difference Result 253 states and 300 transitions. [2020-10-13 10:52:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:52:30,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-13 10:52:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:30,685 INFO L225 Difference]: With dead ends: 253 [2020-10-13 10:52:30,685 INFO L226 Difference]: Without dead ends: 247 [2020-10-13 10:52:30,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:52:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-13 10:52:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 109. [2020-10-13 10:52:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:52:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-13 10:52:30,691 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-13 10:52:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:30,691 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-13 10:52:30,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:52:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-13 10:52:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:52:30,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:30,692 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:30,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:52:30,692 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1647394400, now seen corresponding path program 46 times [2020-10-13 10:52:30,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:30,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887620685] [2020-10-13 10:52:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:33,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:52:33,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2330 [2020-10-13 10:52:33,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:52:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 10:52:33,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:34,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:34,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:34,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:34,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:34,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:34,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:34,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887620685] [2020-10-13 10:52:34,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:34,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:52:34,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134837803] [2020-10-13 10:52:34,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:52:34,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:52:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:52:34,380 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 51 states. [2020-10-13 10:52:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:34,907 INFO L93 Difference]: Finished difference Result 258 states and 306 transitions. [2020-10-13 10:52:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:52:34,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-13 10:52:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:34,909 INFO L225 Difference]: With dead ends: 258 [2020-10-13 10:52:34,910 INFO L226 Difference]: Without dead ends: 252 [2020-10-13 10:52:34,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:52:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-13 10:52:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 111. [2020-10-13 10:52:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:52:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-13 10:52:34,915 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2020-10-13 10:52:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:34,916 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-13 10:52:34,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:52:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-13 10:52:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:52:34,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:34,917 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:34,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:52:34,917 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:34,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2022043973, now seen corresponding path program 47 times [2020-10-13 10:52:34,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:34,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701071046] [2020-10-13 10:52:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:52:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 10:52:36,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:38,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:38,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:38,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:38,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:38,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701071046] [2020-10-13 10:52:38,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:38,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:52:38,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500337050] [2020-10-13 10:52:38,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:52:38,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:52:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:52:38,278 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 52 states. [2020-10-13 10:52:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:38,862 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2020-10-13 10:52:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:52:38,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-13 10:52:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:38,863 INFO L225 Difference]: With dead ends: 263 [2020-10-13 10:52:38,864 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 10:52:38,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:52:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 10:52:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 113. [2020-10-13 10:52:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:52:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-13 10:52:38,869 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-10-13 10:52:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:38,869 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-13 10:52:38,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:52:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-13 10:52:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 10:52:38,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:38,871 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:38,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:52:38,871 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:38,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:38,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2110796886, now seen corresponding path program 48 times [2020-10-13 10:52:38,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:38,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332708308] [2020-10-13 10:52:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:38,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2676 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 10:52:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:42,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:42,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:42,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:42,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:42,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332708308] [2020-10-13 10:52:42,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:42,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:52:42,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099476452] [2020-10-13 10:52:42,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:52:42,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:52:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:52:42,993 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 53 states. [2020-10-13 10:52:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:43,718 INFO L93 Difference]: Finished difference Result 268 states and 318 transitions. [2020-10-13 10:52:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:52:43,719 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-13 10:52:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:43,721 INFO L225 Difference]: With dead ends: 268 [2020-10-13 10:52:43,721 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 10:52:43,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:52:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 10:52:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 115. [2020-10-13 10:52:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:52:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-13 10:52:43,726 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2020-10-13 10:52:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:43,727 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-13 10:52:43,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:52:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-13 10:52:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:52:43,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:43,728 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:43,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:52:43,728 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:43,728 INFO L82 PathProgramCache]: Analyzing trace with hash 926113585, now seen corresponding path program 49 times [2020-10-13 10:52:43,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:43,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581167200] [2020-10-13 10:52:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 10:52:46,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:47,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581167200] [2020-10-13 10:52:47,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:47,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:52:47,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703432758] [2020-10-13 10:52:47,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:52:47,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:52:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:52:47,562 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 54 states. [2020-10-13 10:52:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:48,181 INFO L93 Difference]: Finished difference Result 273 states and 324 transitions. [2020-10-13 10:52:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:52:48,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-13 10:52:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:48,184 INFO L225 Difference]: With dead ends: 273 [2020-10-13 10:52:48,185 INFO L226 Difference]: Without dead ends: 267 [2020-10-13 10:52:48,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:52:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-13 10:52:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 117. [2020-10-13 10:52:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:52:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-13 10:52:48,189 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2020-10-13 10:52:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:48,189 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-13 10:52:48,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:52:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-13 10:52:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 10:52:48,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:48,190 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:48,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:52:48,191 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash 611794764, now seen corresponding path program 50 times [2020-10-13 10:52:48,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:48,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344672886] [2020-10-13 10:52:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:48,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2591 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-13 10:52:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:52,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:52,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:52,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:52,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:52,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:52,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344672886] [2020-10-13 10:52:52,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:52,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:52:52,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302426156] [2020-10-13 10:52:52,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:52:52,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:52:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:52:52,287 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 55 states. [2020-10-13 10:52:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:52,902 INFO L93 Difference]: Finished difference Result 278 states and 330 transitions. [2020-10-13 10:52:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:52:52,902 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-13 10:52:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:52,904 INFO L225 Difference]: With dead ends: 278 [2020-10-13 10:52:52,905 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 10:52:52,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:52:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 10:52:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 119. [2020-10-13 10:52:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 10:52:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-13 10:52:52,909 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2020-10-13 10:52:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:52,909 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-13 10:52:52,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:52:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-13 10:52:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 10:52:52,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:52,910 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:52,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:52:52,911 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash -800881497, now seen corresponding path program 51 times [2020-10-13 10:52:52,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:52,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435648894] [2020-10-13 10:52:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:52:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:52:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:52:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:56,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:56,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:56,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:56,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:56,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:56,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:56,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435648894] [2020-10-13 10:52:56,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:56,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:52:56,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595859613] [2020-10-13 10:52:56,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:52:56,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:52:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:52:56,910 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 56 states. [2020-10-13 10:52:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:57,724 INFO L93 Difference]: Finished difference Result 283 states and 336 transitions. [2020-10-13 10:52:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:52:57,725 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-13 10:52:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:57,727 INFO L225 Difference]: With dead ends: 283 [2020-10-13 10:52:57,727 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 10:52:57,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:52:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 10:52:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 121. [2020-10-13 10:52:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:52:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-13 10:52:57,735 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2020-10-13 10:52:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:57,736 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-13 10:52:57,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:52:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-13 10:52:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:52:57,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:57,737 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:57,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:52:57,737 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1173102782, now seen corresponding path program 52 times [2020-10-13 10:52:57,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:57,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834869102] [2020-10-13 10:52:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:00,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 10:53:00,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:02,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:02,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:02,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834869102] [2020-10-13 10:53:02,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:02,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:53:02,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126172241] [2020-10-13 10:53:02,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:53:02,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:53:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:53:02,210 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 57 states. [2020-10-13 10:53:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:02,887 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2020-10-13 10:53:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:53:02,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-13 10:53:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:02,890 INFO L225 Difference]: With dead ends: 288 [2020-10-13 10:53:02,890 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 10:53:02,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:53:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 10:53:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 123. [2020-10-13 10:53:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:53:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-10-13 10:53:02,894 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2020-10-13 10:53:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:02,895 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-10-13 10:53:02,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:53:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-10-13 10:53:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:53:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:02,896 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:02,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:53:02,896 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1899495197, now seen corresponding path program 53 times [2020-10-13 10:53:02,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:02,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073536102] [2020-10-13 10:53:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:05,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:53:05,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-13 10:53:05,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:53:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:53:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:07,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:07,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:07,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073536102] [2020-10-13 10:53:07,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:07,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:53:07,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625748488] [2020-10-13 10:53:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:53:07,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:53:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:53:07,503 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 58 states. [2020-10-13 10:53:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:08,274 INFO L93 Difference]: Finished difference Result 293 states and 348 transitions. [2020-10-13 10:53:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:53:08,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-13 10:53:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:08,278 INFO L225 Difference]: With dead ends: 293 [2020-10-13 10:53:08,278 INFO L226 Difference]: Without dead ends: 287 [2020-10-13 10:53:08,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-13 10:53:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 125. [2020-10-13 10:53:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:53:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-13 10:53:08,282 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2020-10-13 10:53:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:08,283 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-13 10:53:08,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:53:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-13 10:53:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 10:53:08,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:08,284 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:08,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:53:08,284 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash -271346632, now seen corresponding path program 54 times [2020-10-13 10:53:08,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:08,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865502604] [2020-10-13 10:53:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:10,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:53:10,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:10,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2591 [2020-10-13 10:53:10,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:10,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:53:10,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:10,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 10:53:10,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:12,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:12,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:12,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:12,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:12,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:12,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:12,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:12,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865502604] [2020-10-13 10:53:12,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:12,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:53:12,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975240672] [2020-10-13 10:53:12,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:53:12,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:53:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:12,664 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 59 states. [2020-10-13 10:53:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:13,357 INFO L93 Difference]: Finished difference Result 298 states and 354 transitions. [2020-10-13 10:53:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:53:13,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 124 [2020-10-13 10:53:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:13,359 INFO L225 Difference]: With dead ends: 298 [2020-10-13 10:53:13,359 INFO L226 Difference]: Without dead ends: 292 [2020-10-13 10:53:13,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:53:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-13 10:53:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 127. [2020-10-13 10:53:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:53:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-13 10:53:13,364 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2020-10-13 10:53:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:13,364 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-13 10:53:13,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:53:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-13 10:53:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:53:13,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:13,366 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:13,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:53:13,366 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 903761555, now seen corresponding path program 55 times [2020-10-13 10:53:13,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:13,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417326391] [2020-10-13 10:53:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:16,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:16,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3361 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-13 10:53:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:18,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:18,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:18,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:18,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:18,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:18,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417326391] [2020-10-13 10:53:18,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:18,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:53:18,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178683937] [2020-10-13 10:53:18,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:53:18,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:53:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:53:18,685 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 60 states. [2020-10-13 10:53:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:19,378 INFO L93 Difference]: Finished difference Result 303 states and 360 transitions. [2020-10-13 10:53:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:53:19,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 126 [2020-10-13 10:53:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:19,381 INFO L225 Difference]: With dead ends: 303 [2020-10-13 10:53:19,381 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 10:53:19,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 10:53:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 129. [2020-10-13 10:53:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:53:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-13 10:53:19,384 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2020-10-13 10:53:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:19,385 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-13 10:53:19,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:53:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-13 10:53:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 10:53:19,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:19,386 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:19,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:53:19,386 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:19,386 INFO L82 PathProgramCache]: Analyzing trace with hash 606330414, now seen corresponding path program 56 times [2020-10-13 10:53:19,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:19,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433534717] [2020-10-13 10:53:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:22,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2963 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-13 10:53:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:24,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:24,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:24,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:24,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433534717] [2020-10-13 10:53:24,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:24,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:53:24,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673668364] [2020-10-13 10:53:24,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:53:24,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:53:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:24,358 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 61 states. [2020-10-13 10:53:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:25,099 INFO L93 Difference]: Finished difference Result 308 states and 366 transitions. [2020-10-13 10:53:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:53:25,100 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 128 [2020-10-13 10:53:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:25,102 INFO L225 Difference]: With dead ends: 308 [2020-10-13 10:53:25,102 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 10:53:25,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:53:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 10:53:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 131. [2020-10-13 10:53:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:53:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-13 10:53:25,106 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2020-10-13 10:53:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:25,107 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-13 10:53:25,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:53:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-13 10:53:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 10:53:25,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:25,108 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:25,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:53:25,108 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1757154551, now seen corresponding path program 57 times [2020-10-13 10:53:25,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:25,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526766692] [2020-10-13 10:53:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:25,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3013 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 10:53:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:30,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526766692] [2020-10-13 10:53:30,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:30,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:53:30,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244723782] [2020-10-13 10:53:30,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:53:30,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:53:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:53:30,169 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 62 states. [2020-10-13 10:53:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:30,918 INFO L93 Difference]: Finished difference Result 313 states and 372 transitions. [2020-10-13 10:53:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:53:30,919 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 130 [2020-10-13 10:53:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:30,922 INFO L225 Difference]: With dead ends: 313 [2020-10-13 10:53:30,922 INFO L226 Difference]: Without dead ends: 307 [2020-10-13 10:53:30,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:53:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-13 10:53:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 133. [2020-10-13 10:53:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:53:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-13 10:53:30,926 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2020-10-13 10:53:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:30,926 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-13 10:53:30,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:53:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-13 10:53:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 10:53:30,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:30,927 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:30,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:53:30,928 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:30,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1028506332, now seen corresponding path program 58 times [2020-10-13 10:53:30,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:30,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989110723] [2020-10-13 10:53:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:34,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3749 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-13 10:53:34,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:36,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:36,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:36,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:36,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:36,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989110723] [2020-10-13 10:53:36,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:36,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:53:36,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839069453] [2020-10-13 10:53:36,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:53:36,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:36,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:53:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:53:36,779 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 63 states. [2020-10-13 10:53:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:37,576 INFO L93 Difference]: Finished difference Result 318 states and 378 transitions. [2020-10-13 10:53:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:53:37,576 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 132 [2020-10-13 10:53:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:37,579 INFO L225 Difference]: With dead ends: 318 [2020-10-13 10:53:37,579 INFO L226 Difference]: Without dead ends: 312 [2020-10-13 10:53:37,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:53:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-13 10:53:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 135. [2020-10-13 10:53:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 10:53:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-10-13 10:53:37,584 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2020-10-13 10:53:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:37,584 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-10-13 10:53:37,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:53:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-10-13 10:53:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:53:37,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:37,585 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:37,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:53:37,585 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash -877237121, now seen corresponding path program 59 times [2020-10-13 10:53:37,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:37,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885574340] [2020-10-13 10:53:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:41,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3475 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-13 10:53:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:43,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:43,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:43,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:43,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:43,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:43,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:43,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885574340] [2020-10-13 10:53:43,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:43,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:53:43,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376964664] [2020-10-13 10:53:43,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:53:43,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:53:43,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:53:43,304 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 64 states. [2020-10-13 10:53:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:44,294 INFO L93 Difference]: Finished difference Result 323 states and 384 transitions. [2020-10-13 10:53:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:53:44,294 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 134 [2020-10-13 10:53:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:44,297 INFO L225 Difference]: With dead ends: 323 [2020-10-13 10:53:44,297 INFO L226 Difference]: Without dead ends: 317 [2020-10-13 10:53:44,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:53:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-13 10:53:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 137. [2020-10-13 10:53:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:53:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-13 10:53:44,301 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2020-10-13 10:53:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:44,301 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-13 10:53:44,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:53:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-13 10:53:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 10:53:44,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:44,302 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:44,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:53:44,302 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1536413414, now seen corresponding path program 60 times [2020-10-13 10:53:44,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:44,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137913835] [2020-10-13 10:53:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:48,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:48,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 10:53:48,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:48,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3852 [2020-10-13 10:53:48,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:53:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 10:53:48,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:50,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:50,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:50,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:50,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:50,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137913835] [2020-10-13 10:53:50,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:50,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:53:50,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122388936] [2020-10-13 10:53:50,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:53:50,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:50,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:53:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:53:50,449 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 65 states. [2020-10-13 10:53:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:51,368 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2020-10-13 10:53:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:53:51,369 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 136 [2020-10-13 10:53:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:51,370 INFO L225 Difference]: With dead ends: 328 [2020-10-13 10:53:51,370 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 10:53:51,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:53:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 10:53:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 139. [2020-10-13 10:53:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:53:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-13 10:53:51,374 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2020-10-13 10:53:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:51,375 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-13 10:53:51,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:53:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-13 10:53:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 10:53:51,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:51,376 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:51,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:53:51,377 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash 650328821, now seen corresponding path program 61 times [2020-10-13 10:53:51,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:51,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103755925] [2020-10-13 10:53:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:51,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:54,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:53:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3226 [2020-10-13 10:53:54,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:53:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:53:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 10:53:54,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:56,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:56,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:56,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:56,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103755925] [2020-10-13 10:53:56,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:56,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:53:56,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418410726] [2020-10-13 10:53:56,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:53:56,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:56,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:53:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:53:56,913 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 66 states. [2020-10-13 10:53:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:57,840 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2020-10-13 10:53:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:53:57,840 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 138 [2020-10-13 10:53:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:57,843 INFO L225 Difference]: With dead ends: 333 [2020-10-13 10:53:57,843 INFO L226 Difference]: Without dead ends: 327 [2020-10-13 10:53:57,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:53:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-13 10:53:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 141. [2020-10-13 10:53:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:53:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-13 10:53:57,847 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2020-10-13 10:53:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:57,847 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-13 10:53:57,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:53:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-13 10:53:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:53:57,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:57,849 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:57,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:53:57,849 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1870608912, now seen corresponding path program 62 times [2020-10-13 10:53:57,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:57,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133875822] [2020-10-13 10:53:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4205 [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:02,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 10:54:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-13 10:54:02,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:04,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:04,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:04,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:04,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:04,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:04,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:04,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:04,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:04,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133875822] [2020-10-13 10:54:04,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:04,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 10:54:04,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590171791] [2020-10-13 10:54:04,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 10:54:04,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 10:54:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:54:04,428 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 67 states. [2020-10-13 10:54:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:05,452 INFO L93 Difference]: Finished difference Result 338 states and 402 transitions. [2020-10-13 10:54:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:54:05,453 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 140 [2020-10-13 10:54:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:05,456 INFO L225 Difference]: With dead ends: 338 [2020-10-13 10:54:05,456 INFO L226 Difference]: Without dead ends: 332 [2020-10-13 10:54:05,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:54:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-13 10:54:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 143. [2020-10-13 10:54:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 10:54:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-10-13 10:54:05,460 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2020-10-13 10:54:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:05,461 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-10-13 10:54:05,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 10:54:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-10-13 10:54:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 10:54:05,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:05,462 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:05,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:54:05,462 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2033704555, now seen corresponding path program 63 times [2020-10-13 10:54:05,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:05,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74202499] [2020-10-13 10:54:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:05,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3651 [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 10:54:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-13 10:54:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:11,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:11,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:11,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:11,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:11,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:11,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74202499] [2020-10-13 10:54:11,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:11,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 10:54:11,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058966125] [2020-10-13 10:54:11,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 10:54:11,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 10:54:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:54:11,688 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 68 states. [2020-10-13 10:54:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:12,724 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2020-10-13 10:54:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 10:54:12,724 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 142 [2020-10-13 10:54:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:12,726 INFO L225 Difference]: With dead ends: 343 [2020-10-13 10:54:12,726 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 10:54:12,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 10:54:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 145. [2020-10-13 10:54:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:54:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-13 10:54:12,730 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2020-10-13 10:54:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:12,731 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-13 10:54:12,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 10:54:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-13 10:54:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 10:54:12,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:12,732 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:12,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:54:12,732 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -145172474, now seen corresponding path program 64 times [2020-10-13 10:54:12,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:12,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296176574] [2020-10-13 10:54:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:17,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:17,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 10:54:17,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:17,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4357 [2020-10-13 10:54:17,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:17,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 10:54:17,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:17,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-13 10:54:17,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:19,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:19,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:19,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:19,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296176574] [2020-10-13 10:54:19,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-13 10:54:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771866090] [2020-10-13 10:54:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-13 10:54:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-13 10:54:19,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:19,735 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 69 states. [2020-10-13 10:54:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:20,744 INFO L93 Difference]: Finished difference Result 348 states and 414 transitions. [2020-10-13 10:54:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 10:54:20,745 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 144 [2020-10-13 10:54:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:20,747 INFO L225 Difference]: With dead ends: 348 [2020-10-13 10:54:20,747 INFO L226 Difference]: Without dead ends: 342 [2020-10-13 10:54:20,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:54:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-13 10:54:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 147. [2020-10-13 10:54:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:54:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-13 10:54:20,752 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2020-10-13 10:54:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:20,753 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-13 10:54:20,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-13 10:54:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-13 10:54:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 10:54:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:20,754 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:20,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:54:20,754 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1898043105, now seen corresponding path program 65 times [2020-10-13 10:54:20,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:20,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612352192] [2020-10-13 10:54:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:21,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:25,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:25,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 10:54:25,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:25,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:54:25,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 10:54:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-13 10:54:25,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:28,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:28,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:28,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:28,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612352192] [2020-10-13 10:54:28,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:28,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 10:54:28,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310479125] [2020-10-13 10:54:28,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 10:54:28,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:28,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 10:54:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:54:28,441 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 70 states. [2020-10-13 10:54:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:29,687 INFO L93 Difference]: Finished difference Result 353 states and 420 transitions. [2020-10-13 10:54:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 10:54:29,688 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 146 [2020-10-13 10:54:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:29,690 INFO L225 Difference]: With dead ends: 353 [2020-10-13 10:54:29,690 INFO L226 Difference]: Without dead ends: 347 [2020-10-13 10:54:29,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:54:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-13 10:54:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 149. [2020-10-13 10:54:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:54:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-13 10:54:29,694 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2020-10-13 10:54:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:29,694 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-13 10:54:29,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 10:54:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-13 10:54:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 10:54:29,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:29,695 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:29,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:54:29,695 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1666807044, now seen corresponding path program 66 times [2020-10-13 10:54:29,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:29,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948309255] [2020-10-13 10:54:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:34,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:34,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 10:54:34,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:34,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4605 [2020-10-13 10:54:34,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-13 10:54:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-13 10:54:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:37,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:37,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948309255] [2020-10-13 10:54:37,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:37,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 10:54:37,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155523749] [2020-10-13 10:54:37,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 10:54:37,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 10:54:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:54:37,179 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 71 states. [2020-10-13 10:54:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:38,458 INFO L93 Difference]: Finished difference Result 358 states and 426 transitions. [2020-10-13 10:54:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 10:54:38,459 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 148 [2020-10-13 10:54:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:38,461 INFO L225 Difference]: With dead ends: 358 [2020-10-13 10:54:38,462 INFO L226 Difference]: Without dead ends: 352 [2020-10-13 10:54:38,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 10:54:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-13 10:54:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 151. [2020-10-13 10:54:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:54:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-13 10:54:38,467 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2020-10-13 10:54:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:38,467 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-13 10:54:38,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 10:54:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-13 10:54:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:54:38,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:38,468 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:38,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:54:38,468 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -103898025, now seen corresponding path program 67 times [2020-10-13 10:54:38,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:38,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897544870] [2020-10-13 10:54:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:38,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:43,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:43,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 10:54:43,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:43,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:54:43,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-13 10:54:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-13 10:54:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:46,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:46,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:46,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:46,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:46,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:46,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897544870] [2020-10-13 10:54:46,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:46,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-13 10:54:46,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853721043] [2020-10-13 10:54:46,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-13 10:54:46,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-13 10:54:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 10:54:46,428 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 72 states. [2020-10-13 10:54:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:47,542 INFO L93 Difference]: Finished difference Result 363 states and 432 transitions. [2020-10-13 10:54:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 10:54:47,543 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 150 [2020-10-13 10:54:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:47,545 INFO L225 Difference]: With dead ends: 363 [2020-10-13 10:54:47,545 INFO L226 Difference]: Without dead ends: 357 [2020-10-13 10:54:47,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:54:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-13 10:54:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 153. [2020-10-13 10:54:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:54:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-13 10:54:47,550 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2020-10-13 10:54:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:47,551 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-13 10:54:47,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-13 10:54:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-13 10:54:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 10:54:47,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:47,552 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:47,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 10:54:47,552 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:47,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1386884366, now seen corresponding path program 68 times [2020-10-13 10:54:47,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:47,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736788479] [2020-10-13 10:54:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:47,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:52,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 10:54:52,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4858 [2020-10-13 10:54:52,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 10:54:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:54:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-13 10:54:52,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:55,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:55,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:55,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:55,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:55,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736788479] [2020-10-13 10:54:55,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:55,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-13 10:54:55,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024355679] [2020-10-13 10:54:55,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-13 10:54:55,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-13 10:54:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:54:55,456 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 73 states. [2020-10-13 10:54:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:56,712 INFO L93 Difference]: Finished difference Result 368 states and 438 transitions. [2020-10-13 10:54:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 10:54:56,713 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 152 [2020-10-13 10:54:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:56,716 INFO L225 Difference]: With dead ends: 368 [2020-10-13 10:54:56,716 INFO L226 Difference]: Without dead ends: 362 [2020-10-13 10:54:56,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 10:54:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-13 10:54:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 155. [2020-10-13 10:54:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:54:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-13 10:54:56,721 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2020-10-13 10:54:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:56,721 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-13 10:54:56,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-13 10:54:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-13 10:54:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:54:56,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:56,723 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:56,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 10:54:56,723 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1681144115, now seen corresponding path program 69 times [2020-10-13 10:54:56,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:56,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780285588] [2020-10-13 10:54:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:01,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:01,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 10:55:01,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4565 [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-13 10:55:01,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:04,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:04,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:04,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780285588] [2020-10-13 10:55:04,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:04,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 10:55:04,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68858561] [2020-10-13 10:55:04,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 10:55:04,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 10:55:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 10:55:04,379 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 74 states. [2020-10-13 10:55:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:05,672 INFO L93 Difference]: Finished difference Result 373 states and 444 transitions. [2020-10-13 10:55:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-13 10:55:05,673 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 154 [2020-10-13 10:55:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:05,675 INFO L225 Difference]: With dead ends: 373 [2020-10-13 10:55:05,675 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 10:55:05,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:55:05,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 10:55:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 157. [2020-10-13 10:55:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 10:55:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-13 10:55:05,679 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2020-10-13 10:55:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:05,680 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-13 10:55:05,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 10:55:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-13 10:55:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:55:05,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:05,681 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:05,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 10:55:05,681 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:05,682 INFO L82 PathProgramCache]: Analyzing trace with hash -996921368, now seen corresponding path program 70 times [2020-10-13 10:55:05,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:05,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102543369] [2020-10-13 10:55:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:07,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:10,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-13 10:55:10,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:13,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:13,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:13,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:13,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:13,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102543369] [2020-10-13 10:55:13,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:13,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-13 10:55:13,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326044076] [2020-10-13 10:55:13,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-13 10:55:13,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-13 10:55:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:55:13,851 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 75 states.