/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=BIGGEST --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/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:11:36,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:11:36,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:11:36,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:11:36,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:11:36,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:11:36,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:11:36,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:11:36,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:11:36,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:11:36,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:11:36,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:11:36,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:11:36,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:11:36,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:11:36,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:11:36,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:11:36,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:11:36,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:11:36,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:11:36,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:11:36,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:11:36,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:11:36,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:11:36,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:11:36,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:11:36,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:11:36,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:11:36,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:11:36,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:11:36,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:11:36,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:11:36,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:11:36,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:11:36,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:11:36,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:11:36,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:11:36,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:11:36,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:11:36,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:11:36,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:11:36,220 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 [2020-10-12 16:11:36,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:11:36,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:11:36,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:11:36,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:11:36,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:11:36,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:11:36,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:11:36,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:11:36,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:11:36,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:11:36,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:11:36,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:11:36,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:11:36,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:11:36,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:11:36,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:11:36,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:11:36,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:11:36,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:11:36,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:11:36,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:11:36,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:11:36,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:11:36,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:11:36,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:11:36,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:11:36,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:11:36,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:11:36,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:11:36,273 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:11:36,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:11:36,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:11:36,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:11:36,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:11:36,609 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:11:36,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-12 16:11:36,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce4b22160/28c3be37f6044144ab0dc16f2a09a1fb/FLAGb8af1ff1d [2020-10-12 16:11:37,195 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:11:37,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-12 16:11:37,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce4b22160/28c3be37f6044144ab0dc16f2a09a1fb/FLAGb8af1ff1d [2020-10-12 16:11:37,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce4b22160/28c3be37f6044144ab0dc16f2a09a1fb [2020-10-12 16:11:37,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:11:37,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:11:37,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:37,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:11:37,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:11:37,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46fcb5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37, skipping insertion in model container [2020-10-12 16:11:37,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:11:37,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:11:37,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:37,822 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:11:37,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:37,853 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:11:37,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37 WrapperNode [2020-10-12 16:11:37,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:37,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:11:37,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:11:37,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:11:37,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (1/1) ... [2020-10-12 16:11:37,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:11:37,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:11:37,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:11:37,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:11:37,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (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 [2020-10-12 16:11:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:11:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:11:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:11:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:11:38,263 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:11:38,264 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 16:11:38,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:38 BoogieIcfgContainer [2020-10-12 16:11:38,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:11:38,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:11:38,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:11:38,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:11:38,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:11:37" (1/3) ... [2020-10-12 16:11:38,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4136b4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:38, skipping insertion in model container [2020-10-12 16:11:38,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:37" (2/3) ... [2020-10-12 16:11:38,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4136b4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:38, skipping insertion in model container [2020-10-12 16:11:38,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:38" (3/3) ... [2020-10-12 16:11:38,298 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-12 16:11:38,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:11:38,346 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:11:38,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:11:38,409 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:11:38,409 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:11:38,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:11:38,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:11:38,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:11:38,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:11:38,410 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:11:38,410 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:11:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-12 16:11:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:11:38,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:38,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:38,434 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-12 16:11:38,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:38,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52409853] [2020-10-12 16:11:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:11:38,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-12 16:11:38,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:11:38,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:11:39,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:39,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:11:39,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:39,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:39,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:39,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:39,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52409853] [2020-10-12 16:11:39,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:39,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:11:39,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285165560] [2020-10-12 16:11:39,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:39,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:39,225 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-12 16:11:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:39,392 INFO L93 Difference]: Finished difference Result 55 states and 88 transitions. [2020-10-12 16:11:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:39,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-12 16:11:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:39,409 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:11:39,409 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:11:39,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:11:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:11:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:11:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2020-10-12 16:11:39,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 15 [2020-10-12 16:11:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:39,469 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2020-10-12 16:11:39,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2020-10-12 16:11:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:39,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:39,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:39,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:11:39,473 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-12 16:11:39,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:39,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730845445] [2020-10-12 16:11:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:39,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 16:11:39,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:11:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:11:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:39,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:39,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:39,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:39,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:39,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:39,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730845445] [2020-10-12 16:11:39,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:39,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:11:39,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332458832] [2020-10-12 16:11:39,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:11:39,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:11:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:11:39,609 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2020-10-12 16:11:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:39,636 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-10-12 16:11:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:11:39,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-12 16:11:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:39,641 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:11:39,641 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:11:39,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:11:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:11:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:11:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:11:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-10-12 16:11:39,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 16 [2020-10-12 16:11:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:39,653 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-10-12 16:11:39,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:11:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-10-12 16:11:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:39,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:39,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:39,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:11:39,655 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-12 16:11:39,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:39,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363495864] [2020-10-12 16:11:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:39,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:39,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-12 16:11:39,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:39,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:39,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:39,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:39,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:39,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363495864] [2020-10-12 16:11:39,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:39,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:39,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149949056] [2020-10-12 16:11:39,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:39,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:39,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:39,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:39,957 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 7 states. [2020-10-12 16:11:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:40,045 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-10-12 16:11:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:11:40,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:11:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:40,046 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:11:40,046 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:11:40,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:11:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:11:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:11:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-10-12 16:11:40,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 16 [2020-10-12 16:11:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:40,053 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-10-12 16:11:40,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-10-12 16:11:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:40,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:40,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:40,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:11:40,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1698651309, now seen corresponding path program 1 times [2020-10-12 16:11:40,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:40,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945709077] [2020-10-12 16:11:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:40,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:40,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 16:11:40,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:11:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:11:40,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:11:40,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945709077] [2020-10-12 16:11:40,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:40,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122361604] [2020-10-12 16:11:40,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:40,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,263 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-10-12 16:11:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:40,300 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-10-12 16:11:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:40,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-12 16:11:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:40,303 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:11:40,303 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:11:40,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:11:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:11:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:11:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-10-12 16:11:40,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 18 [2020-10-12 16:11:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:40,316 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-10-12 16:11:40,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-10-12 16:11:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:40,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:40,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:11:40,318 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-12 16:11:40,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:40,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619947196] [2020-10-12 16:11:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:40,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:40,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-12 16:11:40,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:11:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:11:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:40,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:11:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:40,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619947196] [2020-10-12 16:11:40,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:40,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768877663] [2020-10-12 16:11:40,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:40,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,576 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states. [2020-10-12 16:11:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:40,624 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2020-10-12 16:11:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:40,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 16:11:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:40,628 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:11:40,628 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:11:40,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:11:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 16:11:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:11:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-12 16:11:40,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 19 [2020-10-12 16:11:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:40,650 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-12 16:11:40,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-12 16:11:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:40,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:40,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:11:40,653 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-12 16:11:40,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:40,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787172757] [2020-10-12 16:11:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:40,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:40,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 16:11:40,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:40,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:40,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:40,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:40,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:11:40,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787172757] [2020-10-12 16:11:40,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:40,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759336388] [2020-10-12 16:11:40,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:40,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,822 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-12 16:11:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:40,875 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2020-10-12 16:11:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:40,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 16:11:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:40,877 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:11:40,878 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:11:40,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:11:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-12 16:11:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:11:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-10-12 16:11:40,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 19 [2020-10-12 16:11:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:40,887 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-10-12 16:11:40,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-10-12 16:11:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:40,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:40,888 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:40,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:11:40,889 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1315744958, now seen corresponding path program 2 times [2020-10-12 16:11:40,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:40,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493971582] [2020-10-12 16:11:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:41,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:41,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:41,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:41,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:41,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:41,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:41,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493971582] [2020-10-12 16:11:41,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:41,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:41,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200066772] [2020-10-12 16:11:41,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:41,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:41,161 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 7 states. [2020-10-12 16:11:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:41,320 INFO L93 Difference]: Finished difference Result 84 states and 125 transitions. [2020-10-12 16:11:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:11:41,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-12 16:11:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:41,323 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:11:41,323 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:11:41,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:11:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2020-10-12 16:11:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:11:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-12 16:11:41,334 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 19 [2020-10-12 16:11:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:41,335 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-12 16:11:41,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-12 16:11:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:41,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:41,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:41,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:11:41,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -674370641, now seen corresponding path program 1 times [2020-10-12 16:11:41,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:41,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712595113] [2020-10-12 16:11:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:41,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:41,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-12 16:11:41,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:41,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:11:41,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:41,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:42,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:42,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:42,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:42,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:42,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:42,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712595113] [2020-10-12 16:11:42,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:42,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:42,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008585397] [2020-10-12 16:11:42,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:42,091 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 8 states. [2020-10-12 16:11:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:42,255 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2020-10-12 16:11:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:42,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 16:11:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:42,256 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:11:42,257 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:11:42,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:11:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-12 16:11:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:11:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-10-12 16:11:42,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-10-12 16:11:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:42,265 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-10-12 16:11:42,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-10-12 16:11:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:42,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:42,267 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:42,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:11:42,267 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1142891807, now seen corresponding path program 2 times [2020-10-12 16:11:42,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:42,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918266208] [2020-10-12 16:11:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:42,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:11:42,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:11:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:42,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:42,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:42,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918266208] [2020-10-12 16:11:42,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:42,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:42,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903597606] [2020-10-12 16:11:42,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:42,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:42,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:42,412 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-10-12 16:11:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:42,447 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-12 16:11:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:42,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-12 16:11:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:42,449 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:11:42,449 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:11:42,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:11:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 16:11:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:11:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-10-12 16:11:42,461 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 21 [2020-10-12 16:11:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:42,461 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-10-12 16:11:42,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-10-12 16:11:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:42,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:42,465 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:42,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:11:42,465 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 3 times [2020-10-12 16:11:42,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:42,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000236724] [2020-10-12 16:11:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:43,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:43,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-12 16:11:43,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:11:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:43,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:43,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:43,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:43,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:43,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:43,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:43,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:43,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000236724] [2020-10-12 16:11:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761109070] [2020-10-12 16:11:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:43,189 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 10 states. [2020-10-12 16:11:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:43,374 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2020-10-12 16:11:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:43,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 16:11:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:43,375 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:11:43,375 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:11:43,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:11:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 16:11:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:11:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-10-12 16:11:43,382 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 21 [2020-10-12 16:11:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:43,382 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-10-12 16:11:43,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-10-12 16:11:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:43,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:43,383 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:43,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:11:43,384 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1798376095, now seen corresponding path program 3 times [2020-10-12 16:11:43,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:43,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512869284] [2020-10-12 16:11:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:44,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:44,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:11:44,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 16:11:44,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:44,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:44,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:44,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:44,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:44,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:44,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:44,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:44,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512869284] [2020-10-12 16:11:44,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:44,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:44,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724902003] [2020-10-12 16:11:44,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:44,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:44,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:44,479 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 9 states. [2020-10-12 16:11:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:44,692 INFO L93 Difference]: Finished difference Result 86 states and 128 transitions. [2020-10-12 16:11:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:44,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-12 16:11:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:44,694 INFO L225 Difference]: With dead ends: 86 [2020-10-12 16:11:44,694 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:11:44,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:11:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2020-10-12 16:11:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:11:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-10-12 16:11:44,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 21 [2020-10-12 16:11:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:44,702 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-10-12 16:11:44,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-10-12 16:11:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:44,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:44,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:11:44,704 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1791890094, now seen corresponding path program 2 times [2020-10-12 16:11:44,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:44,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829978051] [2020-10-12 16:11:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:45,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:45,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-12 16:11:45,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:11:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:45,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:45,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:45,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:45,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:11:45,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829978051] [2020-10-12 16:11:45,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:45,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:45,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114323181] [2020-10-12 16:11:45,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:45,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:45,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:45,178 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 5 states. [2020-10-12 16:11:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:45,266 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2020-10-12 16:11:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:45,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-12 16:11:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:45,268 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:11:45,268 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:11:45,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:11:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-12 16:11:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:11:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-10-12 16:11:45,275 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 22 [2020-10-12 16:11:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:45,275 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-10-12 16:11:45,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-10-12 16:11:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:45,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:45,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:45,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:11:45,277 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash 389061695, now seen corresponding path program 2 times [2020-10-12 16:11:45,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:45,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987761478] [2020-10-12 16:11:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:45,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:45,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-12 16:11:45,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:45,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:45,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:45,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:45,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:11:45,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987761478] [2020-10-12 16:11:45,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:45,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:45,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104509427] [2020-10-12 16:11:45,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:45,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:45,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:45,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:45,814 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 6 states. [2020-10-12 16:11:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:45,946 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-10-12 16:11:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:45,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 16:11:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:45,948 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:11:45,948 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:11:45,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:11:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-12 16:11:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:11:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2020-10-12 16:11:45,955 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 22 [2020-10-12 16:11:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:45,956 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2020-10-12 16:11:45,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2020-10-12 16:11:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:11:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:45,957 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:45,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:11:45,957 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1391612975, now seen corresponding path program 3 times [2020-10-12 16:11:45,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:45,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410752758] [2020-10-12 16:11:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:48,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:48,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:11:48,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:11:48,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-10-12 16:11:48,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:48,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:11:48,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:11:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:11:48,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:48,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:48,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:48,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:48,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410752758] [2020-10-12 16:11:48,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:48,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:11:48,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382298397] [2020-10-12 16:11:48,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:11:48,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:11:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:48,880 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand 12 states. [2020-10-12 16:11:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:49,391 INFO L93 Difference]: Finished difference Result 120 states and 170 transitions. [2020-10-12 16:11:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:11:49,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-12 16:11:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:49,393 INFO L225 Difference]: With dead ends: 120 [2020-10-12 16:11:49,393 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:11:49,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:11:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:11:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-10-12 16:11:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:11:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-10-12 16:11:49,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 23 [2020-10-12 16:11:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:49,408 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-10-12 16:11:49,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:11:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-10-12 16:11:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:49,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:49,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:49,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:11:49,409 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1399711295, now seen corresponding path program 4 times [2020-10-12 16:11:49,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:49,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032918979] [2020-10-12 16:11:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:49,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:49,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-12 16:11:49,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:11:49,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:49,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:49,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:49,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:49,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:49,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:49,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:11:49,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032918979] [2020-10-12 16:11:49,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:49,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:49,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894419847] [2020-10-12 16:11:49,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:49,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:49,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:49,631 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-10-12 16:11:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:49,705 INFO L93 Difference]: Finished difference Result 100 states and 146 transitions. [2020-10-12 16:11:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:49,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 16:11:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:49,707 INFO L225 Difference]: With dead ends: 100 [2020-10-12 16:11:49,707 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:11:49,708 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 [2020-10-12 16:11:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:11:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-10-12 16:11:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:11:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-10-12 16:11:49,717 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 24 [2020-10-12 16:11:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:49,717 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-10-12 16:11:49,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-10-12 16:11:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:49,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:49,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:11:49,719 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash -325981458, now seen corresponding path program 4 times [2020-10-12 16:11:49,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:49,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910260854] [2020-10-12 16:11:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:49,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:50,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:50,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:50,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:50,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:50,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:50,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:50,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:50,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:50,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:50,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:11:50,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910260854] [2020-10-12 16:11:50,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:50,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:50,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705868369] [2020-10-12 16:11:50,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:50,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:50,680 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 7 states. [2020-10-12 16:11:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:51,236 INFO L93 Difference]: Finished difference Result 107 states and 156 transitions. [2020-10-12 16:11:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:51,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-12 16:11:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:51,238 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:11:51,238 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:11:51,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:11:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-12 16:11:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:11:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2020-10-12 16:11:51,252 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 24 [2020-10-12 16:11:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:51,253 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2020-10-12 16:11:51,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2020-10-12 16:11:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:51,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:51,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:51,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:11:51,254 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash -77124418, now seen corresponding path program 5 times [2020-10-12 16:11:51,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:51,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528438529] [2020-10-12 16:11:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:51,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:52,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:52,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-12 16:11:52,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:52,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:11:52,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:52,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:52,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:52,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528438529] [2020-10-12 16:11:52,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:52,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:52,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607433721] [2020-10-12 16:11:52,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:52,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:52,241 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand 8 states. [2020-10-12 16:11:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:52,662 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2020-10-12 16:11:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:11:52,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 16:11:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:52,664 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:11:52,665 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 16:11:52,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 16:11:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-10-12 16:11:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:11:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 138 transitions. [2020-10-12 16:11:52,677 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 138 transitions. Word has length 25 [2020-10-12 16:11:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:52,677 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 138 transitions. [2020-10-12 16:11:52,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 138 transitions. [2020-10-12 16:11:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:52,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:52,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:11:52,679 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1981592322, now seen corresponding path program 4 times [2020-10-12 16:11:52,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:52,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623606529] [2020-10-12 16:11:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:52,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:53,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:53,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:53,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:53,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-12 16:11:53,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:53,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:53,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:53,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:53,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:53,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:53,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:53,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:53,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:53,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:11:53,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623606529] [2020-10-12 16:11:53,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:53,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:53,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551035111] [2020-10-12 16:11:53,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:53,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:53,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:53,961 INFO L87 Difference]: Start difference. First operand 98 states and 138 transitions. Second operand 7 states. [2020-10-12 16:11:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:54,706 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2020-10-12 16:11:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:54,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-12 16:11:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:54,708 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:11:54,708 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 16:11:54,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 16:11:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2020-10-12 16:11:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:11:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2020-10-12 16:11:54,720 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 25 [2020-10-12 16:11:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:54,721 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2020-10-12 16:11:54,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2020-10-12 16:11:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:54,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:54,726 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:54,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:11:54,726 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1050280606, now seen corresponding path program 6 times [2020-10-12 16:11:54,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:54,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642257858] [2020-10-12 16:11:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:54,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:56,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:56,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:11:56,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1284 [2020-10-12 16:11:56,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:11:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:56,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:56,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:56,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642257858] [2020-10-12 16:11:56,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:56,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:11:56,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991913067] [2020-10-12 16:11:56,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:11:56,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:56,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:11:56,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:56,349 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand 12 states. [2020-10-12 16:11:59,983 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-12 16:12:02,429 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 7 [2020-10-12 16:12:05,096 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-12 16:12:05,555 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-12 16:12:05,937 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2020-10-12 16:12:13,310 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2020-10-12 16:12:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:18,044 INFO L93 Difference]: Finished difference Result 138 states and 195 transitions. [2020-10-12 16:12:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:18,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 16:12:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:18,052 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:12:18,053 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 16:12:18,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:12:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 16:12:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2020-10-12 16:12:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:12:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2020-10-12 16:12:18,065 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 25 [2020-10-12 16:12:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:18,065 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2020-10-12 16:12:18,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2020-10-12 16:12:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:18,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:18,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:12:18,067 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1433360590, now seen corresponding path program 5 times [2020-10-12 16:12:18,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:18,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65646933] [2020-10-12 16:12:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:18,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:12:18,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:12:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:12:18,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:18,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:18,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:18,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:18,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:12:18,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65646933] [2020-10-12 16:12:18,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:18,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:12:18,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814132127] [2020-10-12 16:12:18,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:12:18,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:12:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:18,210 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 5 states. [2020-10-12 16:12:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:18,256 INFO L93 Difference]: Finished difference Result 121 states and 166 transitions. [2020-10-12 16:12:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:12:18,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-12 16:12:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:18,258 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:12:18,258 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 16:12:18,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 16:12:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-12 16:12:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 16:12:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2020-10-12 16:12:18,268 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 26 [2020-10-12 16:12:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:18,269 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2020-10-12 16:12:18,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:12:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2020-10-12 16:12:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:18,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:18,270 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:18,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:12:18,270 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:18,270 INFO L82 PathProgramCache]: Analyzing trace with hash -362673394, now seen corresponding path program 7 times [2020-10-12 16:12:18,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:18,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318509412] [2020-10-12 16:12:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:19,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:19,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:19,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:19,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1564 [2020-10-12 16:12:19,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:19,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:19,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:20,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:20,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318509412] [2020-10-12 16:12:20,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:20,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:20,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822961453] [2020-10-12 16:12:20,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:20,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:20,026 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand 12 states. [2020-10-12 16:12:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:20,876 INFO L93 Difference]: Finished difference Result 229 states and 335 transitions. [2020-10-12 16:12:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:12:20,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-12 16:12:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:20,879 INFO L225 Difference]: With dead ends: 229 [2020-10-12 16:12:20,879 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:12:20,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:12:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:12:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2020-10-12 16:12:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 16:12:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2020-10-12 16:12:20,892 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 26 [2020-10-12 16:12:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:20,893 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2020-10-12 16:12:20,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2020-10-12 16:12:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:20,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:20,894 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:20,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:12:20,894 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:20,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1848985057, now seen corresponding path program 8 times [2020-10-12 16:12:20,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:20,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617159565] [2020-10-12 16:12:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:22,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:22,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:22,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-12 16:12:22,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:12:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:12:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:22,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:22,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:22,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:22,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:22,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:22,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:22,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617159565] [2020-10-12 16:12:22,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:22,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:12:22,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951437208] [2020-10-12 16:12:22,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:12:22,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:22,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:12:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:12:22,387 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand 8 states. [2020-10-12 16:12:22,710 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-12 16:12:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:23,268 INFO L93 Difference]: Finished difference Result 158 states and 214 transitions. [2020-10-12 16:12:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:12:23,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 16:12:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:23,272 INFO L225 Difference]: With dead ends: 158 [2020-10-12 16:12:23,272 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 16:12:23,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 16:12:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2020-10-12 16:12:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:12:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2020-10-12 16:12:23,285 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 27 [2020-10-12 16:12:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:23,286 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2020-10-12 16:12:23,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:12:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2020-10-12 16:12:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:23,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:23,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:23,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:12:23,287 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash 541514335, now seen corresponding path program 5 times [2020-10-12 16:12:23,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:23,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125689140] [2020-10-12 16:12:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:23,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:24,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:24,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:24,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-12 16:12:24,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:12:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:24,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:24,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:24,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:24,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:24,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:24,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:24,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:24,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:24,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:12:24,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125689140] [2020-10-12 16:12:24,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:24,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:24,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714230528] [2020-10-12 16:12:24,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:24,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:24,965 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand 12 states. [2020-10-12 16:12:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:31,484 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2020-10-12 16:12:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:31,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 16:12:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:31,486 INFO L225 Difference]: With dead ends: 179 [2020-10-12 16:12:31,486 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 16:12:31,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 16:12:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2020-10-12 16:12:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 16:12:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 173 transitions. [2020-10-12 16:12:31,500 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 173 transitions. Word has length 27 [2020-10-12 16:12:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:31,500 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 173 transitions. [2020-10-12 16:12:31,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 173 transitions. [2020-10-12 16:12:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:31,501 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:31,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:12:31,501 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash -721580033, now seen corresponding path program 9 times [2020-10-12 16:12:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:31,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315418474] [2020-10-12 16:12:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:31,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:32,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:33,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315418474] [2020-10-12 16:12:33,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:33,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:33,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061904108] [2020-10-12 16:12:33,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:33,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:33,047 INFO L87 Difference]: Start difference. First operand 130 states and 173 transitions. Second operand 13 states. [2020-10-12 16:12:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:46,987 INFO L93 Difference]: Finished difference Result 197 states and 288 transitions. [2020-10-12 16:12:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:12:46,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 16:12:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:46,989 INFO L225 Difference]: With dead ends: 197 [2020-10-12 16:12:46,989 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 16:12:46,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 16:12:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2020-10-12 16:12:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:12:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2020-10-12 16:12:47,005 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 27 [2020-10-12 16:12:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:47,005 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2020-10-12 16:12:47,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2020-10-12 16:12:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:47,006 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:47,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:12:47,006 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1150065203, now seen corresponding path program 10 times [2020-10-12 16:12:47,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:47,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123506762] [2020-10-12 16:12:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:47,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:47,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:47,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-12 16:12:47,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:47,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:12:47,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:47,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:12:47,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:47,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:47,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:47,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123506762] [2020-10-12 16:12:47,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:47,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:47,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776893274] [2020-10-12 16:12:47,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:47,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:47,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:47,755 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand 13 states. [2020-10-12 16:12:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:48,419 INFO L93 Difference]: Finished difference Result 297 states and 425 transitions. [2020-10-12 16:12:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:12:48,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 16:12:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:48,422 INFO L225 Difference]: With dead ends: 297 [2020-10-12 16:12:48,422 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 16:12:48,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:12:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 16:12:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 169. [2020-10-12 16:12:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 16:12:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 226 transitions. [2020-10-12 16:12:48,439 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 226 transitions. Word has length 28 [2020-10-12 16:12:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:48,439 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 226 transitions. [2020-10-12 16:12:48,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 226 transitions. [2020-10-12 16:12:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:48,440 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:48,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:12:48,441 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 728536222, now seen corresponding path program 11 times [2020-10-12 16:12:48,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:48,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620845991] [2020-10-12 16:12:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:49,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:49,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:49,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:49,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:49,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620845991] [2020-10-12 16:12:49,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:49,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:49,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483657049] [2020-10-12 16:12:49,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:49,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:49,422 INFO L87 Difference]: Start difference. First operand 169 states and 226 transitions. Second operand 14 states. [2020-10-12 16:12:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:50,217 INFO L93 Difference]: Finished difference Result 338 states and 477 transitions. [2020-10-12 16:12:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:12:50,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 16:12:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:50,220 INFO L225 Difference]: With dead ends: 338 [2020-10-12 16:12:50,220 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 16:12:50,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:12:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 16:12:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 182. [2020-10-12 16:12:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 16:12:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 243 transitions. [2020-10-12 16:12:50,247 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 243 transitions. Word has length 29 [2020-10-12 16:12:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:50,248 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 243 transitions. [2020-10-12 16:12:50,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 243 transitions. [2020-10-12 16:12:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:50,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:50,249 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:50,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:12:50,250 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1164361747, now seen corresponding path program 12 times [2020-10-12 16:12:50,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247930] [2020-10-12 16:12:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:50,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:12:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:51,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:51,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247930] [2020-10-12 16:12:51,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:12:51,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459184149] [2020-10-12 16:12:51,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:12:51,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:12:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:51,252 INFO L87 Difference]: Start difference. First operand 182 states and 243 transitions. Second operand 15 states. [2020-10-12 16:12:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,175 INFO L93 Difference]: Finished difference Result 364 states and 514 transitions. [2020-10-12 16:12:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:12:52,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 16:12:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,178 INFO L225 Difference]: With dead ends: 364 [2020-10-12 16:12:52,178 INFO L226 Difference]: Without dead ends: 287 [2020-10-12 16:12:52,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:12:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-12 16:12:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 195. [2020-10-12 16:12:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 16:12:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2020-10-12 16:12:52,200 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 30 [2020-10-12 16:12:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,200 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2020-10-12 16:12:52,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:12:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2020-10-12 16:12:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:12:52,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,201 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:12:52,202 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1471952257, now seen corresponding path program 6 times [2020-10-12 16:12:52,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686872534] [2020-10-12 16:12:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:52,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:52,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:52,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 16:12:52,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686872534] [2020-10-12 16:12:52,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:52,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:12:52,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135561894] [2020-10-12 16:12:52,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:12:52,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:12:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:52,386 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand 6 states. [2020-10-12 16:12:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,479 INFO L93 Difference]: Finished difference Result 208 states and 275 transitions. [2020-10-12 16:12:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:12:52,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-12 16:12:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,482 INFO L225 Difference]: With dead ends: 208 [2020-10-12 16:12:52,482 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 16:12:52,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 16:12:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-12 16:12:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 16:12:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 245 transitions. [2020-10-12 16:12:52,502 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 245 transitions. Word has length 31 [2020-10-12 16:12:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,502 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 245 transitions. [2020-10-12 16:12:52,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:12:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 245 transitions. [2020-10-12 16:12:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:12:52,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,504 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:12:52,504 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash 285343358, now seen corresponding path program 13 times [2020-10-12 16:12:52,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816544852] [2020-10-12 16:12:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:12:53,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:53,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:53,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:53,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816544852] [2020-10-12 16:12:53,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:53,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:12:53,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433882773] [2020-10-12 16:12:53,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:12:53,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:12:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:53,661 INFO L87 Difference]: Start difference. First operand 182 states and 245 transitions. Second operand 16 states. [2020-10-12 16:12:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:54,691 INFO L93 Difference]: Finished difference Result 369 states and 523 transitions. [2020-10-12 16:12:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:12:54,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-12 16:12:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:54,693 INFO L225 Difference]: With dead ends: 369 [2020-10-12 16:12:54,693 INFO L226 Difference]: Without dead ends: 291 [2020-10-12 16:12:54,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:12:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-12 16:12:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 195. [2020-10-12 16:12:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 16:12:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 262 transitions. [2020-10-12 16:12:54,716 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 262 transitions. Word has length 31 [2020-10-12 16:12:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:54,716 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 262 transitions. [2020-10-12 16:12:54,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:12:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 262 transitions. [2020-10-12 16:12:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:12:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:54,717 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:54,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:12:54,718 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash -839091507, now seen corresponding path program 6 times [2020-10-12 16:12:54,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:54,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364698517] [2020-10-12 16:12:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:54,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:12:59,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:12:59,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 16:12:59,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:12:59,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:12:59,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:12:59,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:00,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:00,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:00,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:00,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:00,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:13:00,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364698517] [2020-10-12 16:13:00,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:00,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:13:00,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210359629] [2020-10-12 16:13:00,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:13:00,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:13:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:00,134 INFO L87 Difference]: Start difference. First operand 195 states and 262 transitions. Second operand 18 states. [2020-10-12 16:13:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:01,964 INFO L93 Difference]: Finished difference Result 353 states and 470 transitions. [2020-10-12 16:13:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:13:01,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-12 16:13:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:01,967 INFO L225 Difference]: With dead ends: 353 [2020-10-12 16:13:01,967 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 16:13:01,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:13:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 16:13:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-10-12 16:13:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 16:13:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2020-10-12 16:13:01,995 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 32 [2020-10-12 16:13:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:01,996 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2020-10-12 16:13:02,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:13:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2020-10-12 16:13:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:02,004 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:02,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:13:02,004 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 803253229, now seen corresponding path program 14 times [2020-10-12 16:13:02,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:02,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894258929] [2020-10-12 16:13:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:04,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:04,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:04,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2853 [2020-10-12 16:13:04,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:13:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:04,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:13:04,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:05,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:05,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:05,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:05,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:05,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894258929] [2020-10-12 16:13:05,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:05,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:13:05,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409316968] [2020-10-12 16:13:05,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:13:05,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:05,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:13:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:05,241 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand 20 states. [2020-10-12 16:13:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:07,230 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2020-10-12 16:13:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:13:07,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-10-12 16:13:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:07,233 INFO L225 Difference]: With dead ends: 383 [2020-10-12 16:13:07,233 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 16:13:07,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=2526, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:13:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 16:13:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 190. [2020-10-12 16:13:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 16:13:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2020-10-12 16:13:07,259 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 32 [2020-10-12 16:13:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:07,260 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2020-10-12 16:13:07,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:13:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2020-10-12 16:13:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:13:07,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:07,261 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:07,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:13:07,261 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1894512066, now seen corresponding path program 15 times [2020-10-12 16:13:07,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:07,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676537470] [2020-10-12 16:13:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:13:11,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3940 [2020-10-12 16:13:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:13:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:13:11,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:11,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:11,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:11,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:11,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:11,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676537470] [2020-10-12 16:13:11,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:11,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:13:11,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089351778] [2020-10-12 16:13:11,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:13:11,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:11,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:13:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:13:11,631 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand 21 states. [2020-10-12 16:13:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:13,781 INFO L93 Difference]: Finished difference Result 405 states and 542 transitions. [2020-10-12 16:13:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:13:13,782 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-10-12 16:13:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:13,785 INFO L225 Difference]: With dead ends: 405 [2020-10-12 16:13:13,785 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 16:13:13,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=2838, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:13:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 16:13:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 202. [2020-10-12 16:13:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 16:13:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2020-10-12 16:13:13,816 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 33 [2020-10-12 16:13:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:13,819 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2020-10-12 16:13:13,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:13:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2020-10-12 16:13:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:13:13,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:13,820 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:13,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:13:13,820 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2098494527, now seen corresponding path program 7 times [2020-10-12 16:13:13,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:13,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437306804] [2020-10-12 16:13:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:13,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:13,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:14,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:16,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:13:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:17,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:17,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:13:17,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437306804] [2020-10-12 16:13:17,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:17,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:17,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322636397] [2020-10-12 16:13:17,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:17,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:17,058 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand 13 states. [2020-10-12 16:13:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:22,232 INFO L93 Difference]: Finished difference Result 352 states and 510 transitions. [2020-10-12 16:13:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:22,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 16:13:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:22,236 INFO L225 Difference]: With dead ends: 352 [2020-10-12 16:13:22,236 INFO L226 Difference]: Without dead ends: 347 [2020-10-12 16:13:22,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-12 16:13:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 242. [2020-10-12 16:13:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-12 16:13:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 323 transitions. [2020-10-12 16:13:22,261 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 323 transitions. Word has length 34 [2020-10-12 16:13:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:22,261 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 323 transitions. [2020-10-12 16:13:22,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 323 transitions. [2020-10-12 16:13:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:13:22,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:22,262 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:22,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:13:22,263 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:22,263 INFO L82 PathProgramCache]: Analyzing trace with hash 374109709, now seen corresponding path program 16 times [2020-10-12 16:13:22,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:22,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857754054] [2020-10-12 16:13:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:22,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:22,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:22,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:23,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:23,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:26,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4533 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:26,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:13:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:27,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:27,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:27,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:27,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:27,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:27,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:27,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857754054] [2020-10-12 16:13:27,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:27,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:13:27,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102535858] [2020-10-12 16:13:27,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:13:27,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:13:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:13:27,269 INFO L87 Difference]: Start difference. First operand 242 states and 323 transitions. Second operand 22 states. [2020-10-12 16:13:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:29,702 INFO L93 Difference]: Finished difference Result 567 states and 787 transitions. [2020-10-12 16:13:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:13:29,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-10-12 16:13:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:29,706 INFO L225 Difference]: With dead ends: 567 [2020-10-12 16:13:29,706 INFO L226 Difference]: Without dead ends: 434 [2020-10-12 16:13:29,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:13:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-12 16:13:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 254. [2020-10-12 16:13:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-12 16:13:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2020-10-12 16:13:29,741 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 34 [2020-10-12 16:13:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:29,742 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2020-10-12 16:13:29,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:13:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2020-10-12 16:13:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:13:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:29,743 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:29,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:13:29,744 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1981907998, now seen corresponding path program 17 times [2020-10-12 16:13:29,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:29,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713723913] [2020-10-12 16:13:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:29,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:30,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:30,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:35,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:35,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:35,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:35,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:35,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:35,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:35,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:35,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713723913] [2020-10-12 16:13:35,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:35,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:13:35,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803507132] [2020-10-12 16:13:35,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:13:35,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:13:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:13:35,260 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand 23 states. [2020-10-12 16:13:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:37,734 INFO L93 Difference]: Finished difference Result 597 states and 826 transitions. [2020-10-12 16:13:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:13:37,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-12 16:13:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:37,738 INFO L225 Difference]: With dead ends: 597 [2020-10-12 16:13:37,738 INFO L226 Difference]: Without dead ends: 464 [2020-10-12 16:13:37,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=3172, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:13:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-12 16:13:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2020-10-12 16:13:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-12 16:13:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 351 transitions. [2020-10-12 16:13:37,772 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 351 transitions. Word has length 35 [2020-10-12 16:13:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:37,773 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 351 transitions. [2020-10-12 16:13:37,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:13:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 351 transitions. [2020-10-12 16:13:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:13:37,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:37,774 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:37,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:13:37,774 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash 131602158, now seen corresponding path program 7 times [2020-10-12 16:13:37,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:37,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859048833] [2020-10-12 16:13:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:38,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:13:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:13:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:13:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:38,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:38,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:38,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:38,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 16:13:38,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859048833] [2020-10-12 16:13:38,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:38,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:38,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388990467] [2020-10-12 16:13:38,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:38,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:38,117 INFO L87 Difference]: Start difference. First operand 266 states and 351 transitions. Second operand 7 states. [2020-10-12 16:13:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:38,223 INFO L93 Difference]: Finished difference Result 293 states and 384 transitions. [2020-10-12 16:13:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:13:38,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-12 16:13:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:38,225 INFO L225 Difference]: With dead ends: 293 [2020-10-12 16:13:38,225 INFO L226 Difference]: Without dead ends: 248 [2020-10-12 16:13:38,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-12 16:13:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-10-12 16:13:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-12 16:13:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 331 transitions. [2020-10-12 16:13:38,260 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 331 transitions. Word has length 36 [2020-10-12 16:13:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:38,261 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 331 transitions. [2020-10-12 16:13:38,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 331 transitions. [2020-10-12 16:13:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:13:38,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:38,262 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:38,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:13:38,263 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash 284047405, now seen corresponding path program 18 times [2020-10-12 16:13:38,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:38,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890473618] [2020-10-12 16:13:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:43,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:13:43,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:13:43,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:13:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:13:43,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:43,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:43,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:43,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:43,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:43,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:43,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:43,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890473618] [2020-10-12 16:13:43,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:43,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:13:43,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62756177] [2020-10-12 16:13:43,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:13:43,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:43,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:13:43,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:13:43,905 INFO L87 Difference]: Start difference. First operand 248 states and 331 transitions. Second operand 24 states. [2020-10-12 16:13:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:46,564 INFO L93 Difference]: Finished difference Result 556 states and 783 transitions. [2020-10-12 16:13:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:13:46,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-10-12 16:13:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:46,567 INFO L225 Difference]: With dead ends: 556 [2020-10-12 16:13:46,567 INFO L226 Difference]: Without dead ends: 422 [2020-10-12 16:13:46,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=3288, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:13:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-12 16:13:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 260. [2020-10-12 16:13:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-12 16:13:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 345 transitions. [2020-10-12 16:13:46,607 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 345 transitions. Word has length 36 [2020-10-12 16:13:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:46,608 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 345 transitions. [2020-10-12 16:13:46,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:13:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 345 transitions. [2020-10-12 16:13:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:13:46,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:46,609 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:46,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:13:46,609 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1381980174, now seen corresponding path program 3 times [2020-10-12 16:13:46,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:46,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212653552] [2020-10-12 16:13:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:46,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:51,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4828 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:13:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:51,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:13:51,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212653552] [2020-10-12 16:13:51,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:51,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:13:51,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079939302] [2020-10-12 16:13:51,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:13:51,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:13:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:51,599 INFO L87 Difference]: Start difference. First operand 260 states and 345 transitions. Second operand 10 states. [2020-10-12 16:13:54,887 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 16:13:55,693 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-12 16:13:56,371 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:13:57,716 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-12 16:13:58,084 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-12 16:13:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:58,650 INFO L93 Difference]: Finished difference Result 377 states and 502 transitions. [2020-10-12 16:13:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:58,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-12 16:13:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:58,654 INFO L225 Difference]: With dead ends: 377 [2020-10-12 16:13:58,654 INFO L226 Difference]: Without dead ends: 372 [2020-10-12 16:13:58,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:13:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-12 16:13:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 278. [2020-10-12 16:13:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-12 16:13:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 370 transitions. [2020-10-12 16:13:58,689 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 370 transitions. Word has length 37 [2020-10-12 16:13:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:58,689 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 370 transitions. [2020-10-12 16:13:58,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:13:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 370 transitions. [2020-10-12 16:13:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:13:58,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:58,690 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:58,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:13:58,690 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -20848225, now seen corresponding path program 8 times [2020-10-12 16:13:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:58,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478692763] [2020-10-12 16:13:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3589 [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:14:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:14:02,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:02,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:02,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:14:02,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478692763] [2020-10-12 16:14:02,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:02,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:14:02,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229464341] [2020-10-12 16:14:02,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:14:02,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:14:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:02,437 INFO L87 Difference]: Start difference. First operand 278 states and 370 transitions. Second operand 10 states. [2020-10-12 16:14:03,048 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:14:05,419 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 16:14:05,840 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:14:06,715 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-12 16:14:08,269 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-12 16:14:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:09,564 INFO L93 Difference]: Finished difference Result 349 states and 479 transitions. [2020-10-12 16:14:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:09,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-12 16:14:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:09,567 INFO L225 Difference]: With dead ends: 349 [2020-10-12 16:14:09,567 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 16:14:09,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 16:14:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 315. [2020-10-12 16:14:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-12 16:14:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 418 transitions. [2020-10-12 16:14:09,603 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 418 transitions. Word has length 37 [2020-10-12 16:14:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:09,603 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 418 transitions. [2020-10-12 16:14:09,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:14:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 418 transitions. [2020-10-12 16:14:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:14:09,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:09,605 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:09,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:14:09,605 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash -810023426, now seen corresponding path program 19 times [2020-10-12 16:14:09,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:09,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601006718] [2020-10-12 16:14:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:09,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:09,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:14,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:14,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:14:14,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:14:14,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4722 [2020-10-12 16:14:14,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:14:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:14:14,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:14,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:14,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:14,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:14,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:14,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:14,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:14,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:14,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:14,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:14,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:14,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:14,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601006718] [2020-10-12 16:14:14,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:14,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:14:14,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998771460] [2020-10-12 16:14:14,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:14:14,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:14,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:14:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:14,932 INFO L87 Difference]: Start difference. First operand 315 states and 418 transitions. Second operand 25 states. [2020-10-12 16:14:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:17,699 INFO L93 Difference]: Finished difference Result 678 states and 943 transitions. [2020-10-12 16:14:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:14:17,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-10-12 16:14:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:17,704 INFO L225 Difference]: With dead ends: 678 [2020-10-12 16:14:17,704 INFO L226 Difference]: Without dead ends: 525 [2020-10-12 16:14:17,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:14:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-12 16:14:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2020-10-12 16:14:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-12 16:14:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 432 transitions. [2020-10-12 16:14:17,752 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 432 transitions. Word has length 37 [2020-10-12 16:14:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:17,753 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 432 transitions. [2020-10-12 16:14:17,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:14:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 432 transitions. [2020-10-12 16:14:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:14:17,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:17,754 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:17,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:14:17,755 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 179239821, now seen corresponding path program 9 times [2020-10-12 16:14:17,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:17,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215671766] [2020-10-12 16:14:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:14:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:23,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:23,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:14:23,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215671766] [2020-10-12 16:14:23,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:23,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520655835] [2020-10-12 16:14:23,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:23,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:23,101 INFO L87 Difference]: Start difference. First operand 327 states and 432 transitions. Second operand 18 states. [2020-10-12 16:14:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:25,975 INFO L93 Difference]: Finished difference Result 472 states and 637 transitions. [2020-10-12 16:14:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 16:14:25,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 16:14:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:25,978 INFO L225 Difference]: With dead ends: 472 [2020-10-12 16:14:25,978 INFO L226 Difference]: Without dead ends: 430 [2020-10-12 16:14:25,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=281, Invalid=6039, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:14:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-12 16:14:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 353. [2020-10-12 16:14:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-12 16:14:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 459 transitions. [2020-10-12 16:14:26,024 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 459 transitions. Word has length 38 [2020-10-12 16:14:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:26,025 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 459 transitions. [2020-10-12 16:14:26,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 459 transitions. [2020-10-12 16:14:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:14:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:26,026 INFO L422 BasicCegarLoop]: trace histogram [15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:14:26,027 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash -366480819, now seen corresponding path program 20 times [2020-10-12 16:14:26,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419577748] [2020-10-12 16:14:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:31,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:14:31,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:31,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:31,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:31,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:31,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419577748] [2020-10-12 16:14:31,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:31,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:14:31,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458803710] [2020-10-12 16:14:31,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:14:31,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:14:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:31,649 INFO L87 Difference]: Start difference. First operand 353 states and 459 transitions. Second operand 26 states. [2020-10-12 16:14:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:34,637 INFO L93 Difference]: Finished difference Result 735 states and 1006 transitions. [2020-10-12 16:14:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:14:34,638 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2020-10-12 16:14:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:34,640 INFO L225 Difference]: With dead ends: 735 [2020-10-12 16:14:34,640 INFO L226 Difference]: Without dead ends: 582 [2020-10-12 16:14:34,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:14:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-12 16:14:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 365. [2020-10-12 16:14:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-12 16:14:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 473 transitions. [2020-10-12 16:14:34,677 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 473 transitions. Word has length 38 [2020-10-12 16:14:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:34,677 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 473 transitions. [2020-10-12 16:14:34,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:14:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 473 transitions. [2020-10-12 16:14:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:14:34,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:34,678 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:34,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:14:34,678 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1693358046, now seen corresponding path program 4 times [2020-10-12 16:14:34,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:34,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693546331] [2020-10-12 16:14:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:35,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:39,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:14:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:40,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:40,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693546331] [2020-10-12 16:14:40,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:40,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:14:40,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802350602] [2020-10-12 16:14:40,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:14:40,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:14:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:40,117 INFO L87 Difference]: Start difference. First operand 365 states and 473 transitions. Second operand 20 states. [2020-10-12 16:14:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:41,659 INFO L93 Difference]: Finished difference Result 498 states and 656 transitions. [2020-10-12 16:14:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:14:41,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-12 16:14:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:41,662 INFO L225 Difference]: With dead ends: 498 [2020-10-12 16:14:41,662 INFO L226 Difference]: Without dead ends: 468 [2020-10-12 16:14:41,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=1929, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:14:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-12 16:14:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 356. [2020-10-12 16:14:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-12 16:14:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 463 transitions. [2020-10-12 16:14:41,710 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 463 transitions. Word has length 39 [2020-10-12 16:14:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:41,711 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 463 transitions. [2020-10-12 16:14:41,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:14:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 463 transitions. [2020-10-12 16:14:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:14:41,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:41,712 INFO L422 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:41,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:14:41,712 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 498438110, now seen corresponding path program 21 times [2020-10-12 16:14:41,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:41,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663944550] [2020-10-12 16:14:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:41,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:14:46,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:47,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:47,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663944550] [2020-10-12 16:14:47,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:47,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:14:47,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034379175] [2020-10-12 16:14:47,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:14:47,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:14:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:14:47,393 INFO L87 Difference]: Start difference. First operand 356 states and 463 transitions. Second operand 27 states. [2020-10-12 16:14:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:50,618 INFO L93 Difference]: Finished difference Result 752 states and 1030 transitions. [2020-10-12 16:14:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:14:50,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2020-10-12 16:14:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:50,621 INFO L225 Difference]: With dead ends: 752 [2020-10-12 16:14:50,621 INFO L226 Difference]: Without dead ends: 599 [2020-10-12 16:14:50,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=3648, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:14:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-12 16:14:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 368. [2020-10-12 16:14:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 16:14:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 477 transitions. [2020-10-12 16:14:50,675 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 477 transitions. Word has length 39 [2020-10-12 16:14:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:50,675 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 477 transitions. [2020-10-12 16:14:50,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:14:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 477 transitions. [2020-10-12 16:14:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:14:50,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:50,677 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:50,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:14:50,677 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -516083026, now seen corresponding path program 5 times [2020-10-12 16:14:50,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:50,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258180761] [2020-10-12 16:14:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:54,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4039 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:14:54,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:54,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:54,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:54,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:54,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-12 16:14:54,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258180761] [2020-10-12 16:14:54,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:54,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:54,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365338944] [2020-10-12 16:14:54,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:54,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:54,999 INFO L87 Difference]: Start difference. First operand 368 states and 477 transitions. Second operand 11 states. [2020-10-12 16:14:58,072 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 61 [2020-10-12 16:15:02,454 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification that was a NOOP. DAG size: 58 [2020-10-12 16:15:06,424 WARN L193 SmtUtils]: Spent 3.91 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:15:06,683 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-12 16:15:07,896 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-12 16:15:08,513 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 16:15:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:15,261 INFO L93 Difference]: Finished difference Result 526 states and 682 transitions. [2020-10-12 16:15:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:15:15,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-12 16:15:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:15,264 INFO L225 Difference]: With dead ends: 526 [2020-10-12 16:15:15,264 INFO L226 Difference]: Without dead ends: 521 [2020-10-12 16:15:15,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-12 16:15:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 379. [2020-10-12 16:15:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 16:15:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2020-10-12 16:15:15,318 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 40 [2020-10-12 16:15:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:15,318 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2020-10-12 16:15:15,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2020-10-12 16:15:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:15:15,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:15,319 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:15,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:15:15,320 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1918911425, now seen corresponding path program 10 times [2020-10-12 16:15:15,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:15,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653571274] [2020-10-12 16:15:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:20,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:15:20,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:20,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:15:20,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:20,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:15:20,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 16:15:20,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:15:20,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:20,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:20,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-12 16:15:20,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653571274] [2020-10-12 16:15:20,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:20,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:15:20,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376570801] [2020-10-12 16:15:20,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:15:20,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:20,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:15:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:20,552 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand 11 states. [2020-10-12 16:15:22,827 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:15:27,538 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 60 [2020-10-12 16:15:30,221 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-12 16:15:31,030 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:15:32,197 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-12 16:15:32,801 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-12 16:15:33,226 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 16:15:33,457 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-12 16:15:37,471 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-12 16:15:40,208 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-12 16:15:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:40,209 INFO L93 Difference]: Finished difference Result 537 states and 686 transitions. [2020-10-12 16:15:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:15:40,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-12 16:15:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:40,211 INFO L225 Difference]: With dead ends: 537 [2020-10-12 16:15:40,211 INFO L226 Difference]: Without dead ends: 532 [2020-10-12 16:15:40,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:15:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-12 16:15:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 379. [2020-10-12 16:15:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 16:15:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2020-10-12 16:15:40,259 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 40 [2020-10-12 16:15:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:40,259 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2020-10-12 16:15:40,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2020-10-12 16:15:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:15:40,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:40,260 INFO L422 BasicCegarLoop]: trace histogram [17, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:40,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:15:40,261 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1541121133, now seen corresponding path program 22 times [2020-10-12 16:15:40,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:40,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310385991] [2020-10-12 16:15:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:41,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:15:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:15:45,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:45,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:45,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:45,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:45,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:45,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:45,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:15:46,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310385991] [2020-10-12 16:15:46,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:46,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:15:46,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697356089] [2020-10-12 16:15:46,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:15:46,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:15:46,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:15:46,003 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand 28 states.