/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/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:43:07,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:43:07,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:43:07,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:43:07,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:43:07,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:43:07,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:43:07,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:43:07,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:43:07,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:43:07,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:43:07,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:43:07,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:43:07,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:43:07,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:43:07,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:43:07,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:43:07,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:43:07,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:43:07,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:43:07,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:43:07,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:43:07,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:43:07,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:43:07,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:43:07,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:43:07,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:43:07,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:43:07,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:43:07,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:43:07,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:43:07,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:43:07,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:43:07,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:43:07,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:43:07,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:43:07,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:43:07,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:43:07,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:43:07,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:43:07,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:43:07,339 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 09:43:07,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:43:07,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:43:07,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:43:07,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:43:07,366 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:43:07,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:43:07,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:43:07,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:43:07,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:43:07,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:43:07,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:43:07,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:43:07,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:43:07,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:43:07,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:43:07,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:43:07,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:43:07,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:43:07,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:43:07,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:43:07,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:43:07,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:43:07,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:43:07,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:43:07,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:43:07,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:43:07,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:43:07,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:43:07,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:43:07,371 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 09:43:07,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:43:07,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:43:07,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:43:07,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:43:07,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:43:07,675 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-12 09:43:07,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd11b5f18/98339c0c9f6845e382925f9bb9a40bfa/FLAGf33309cad [2020-10-12 09:43:08,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:43:08,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-12 09:43:08,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd11b5f18/98339c0c9f6845e382925f9bb9a40bfa/FLAGf33309cad [2020-10-12 09:43:08,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd11b5f18/98339c0c9f6845e382925f9bb9a40bfa [2020-10-12 09:43:08,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:43:08,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:43:08,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:08,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:43:08,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:43:08,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:08,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddb78d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08, skipping insertion in model container [2020-10-12 09:43:08,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:08,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:43:08,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:43:08,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:08,888 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:43:08,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:08,943 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:43:08,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08 WrapperNode [2020-10-12 09:43:08,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:08,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:43:08,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:43:08,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:43:09,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (1/1) ... [2020-10-12 09:43:09,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:43:09,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:43:09,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:43:09,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:43:09,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (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 09:43:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:43:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:43:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:43:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:43:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:43:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:43:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:43:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:43:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:43:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:43:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:43:09,435 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:43:09,435 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:43:09,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:09 BoogieIcfgContainer [2020-10-12 09:43:09,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:43:09,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:43:09,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:43:09,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:43:09,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:43:08" (1/3) ... [2020-10-12 09:43:09,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a817738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:09, skipping insertion in model container [2020-10-12 09:43:09,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:08" (2/3) ... [2020-10-12 09:43:09,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a817738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:09, skipping insertion in model container [2020-10-12 09:43:09,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:09" (3/3) ... [2020-10-12 09:43:09,449 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2020-10-12 09:43:09,463 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:43:09,475 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:43:09,498 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:43:09,518 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:43:09,518 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:43:09,518 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:43:09,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:43:09,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:43:09,518 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:43:09,518 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:43:09,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:43:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-12 09:43:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:43:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:09,544 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 09:43:09,545 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1619448805, now seen corresponding path program 1 times [2020-10-12 09:43:09,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:09,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578878844] [2020-10-12 09:43:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:10,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:10,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:43:10,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:43:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-12 09:43:10,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:10,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:43:10,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:43:10,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:10,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:10,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:10,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:10,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:43:10,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:10,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:10,983 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 09:43:10,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578878844] [2020-10-12 09:43:10,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:10,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:43:10,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671206109] [2020-10-12 09:43:10,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:10,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:11,016 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2020-10-12 09:43:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:11,354 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-12 09:43:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:11,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 09:43:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:11,371 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:43:11,371 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 09:43:11,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 09:43:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 09:43:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:43:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-12 09:43:11,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-12 09:43:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:11,435 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-12 09:43:11,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-12 09:43:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:43:11,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:11,438 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, 1, 1] [2020-10-12 09:43:11,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:43:11,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1525042861, now seen corresponding path program 1 times [2020-10-12 09:43:11,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:11,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263988352] [2020-10-12 09:43:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:11,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:12,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:12,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:43:12,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:43:12,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-12 09:43:12,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:12,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:43:12,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:12,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:12,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:12,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:12,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:12,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 09:43:12,884 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 09:43:12,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263988352] [2020-10-12 09:43:12,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:12,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:43:12,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812015370] [2020-10-12 09:43:12,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:12,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:12,891 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-12 09:43:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:13,122 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-10-12 09:43:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:43:13,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 09:43:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:13,125 INFO L225 Difference]: With dead ends: 62 [2020-10-12 09:43:13,125 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:43:13,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:43:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-12 09:43:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:43:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-12 09:43:13,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-12 09:43:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:13,143 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-12 09:43:13,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-12 09:43:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:43:13,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:13,145 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, 1, 1] [2020-10-12 09:43:13,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:43:13,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1185906157, now seen corresponding path program 1 times [2020-10-12 09:43:13,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:13,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626107166] [2020-10-12 09:43:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:13,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:13,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:14,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:43:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:43:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-12 09:43:14,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:43:14,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:14,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:14,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:14,349 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 09:43:14,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626107166] [2020-10-12 09:43:14,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:14,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:43:14,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681986010] [2020-10-12 09:43:14,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:14,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:14,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:14,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:14,353 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-12 09:43:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:14,505 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-12 09:43:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:14,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 09:43:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:14,507 INFO L225 Difference]: With dead ends: 39 [2020-10-12 09:43:14,507 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 09:43:14,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 09:43:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 09:43:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 09:43:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-12 09:43:14,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-12 09:43:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:14,516 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-12 09:43:14,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-12 09:43:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:43:14,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:14,517 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:14,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:43:14,518 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash 856145037, now seen corresponding path program 1 times [2020-10-12 09:43:14,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:14,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531935363] [2020-10-12 09:43:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:16,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:17,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:19,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:19,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:43:19,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 09:43:19,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4812 [2020-10-12 09:43:19,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:43:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:43:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:19,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:19,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:19,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:19,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:19,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:19,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:19,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531935363] [2020-10-12 09:43:19,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:19,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:43:19,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435289783] [2020-10-12 09:43:19,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:43:19,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:43:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:43:19,769 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 15 states. [2020-10-12 09:43:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:20,343 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-12 09:43:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:43:20,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-12 09:43:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:20,345 INFO L225 Difference]: With dead ends: 49 [2020-10-12 09:43:20,345 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:43:20,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:43:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:43:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:43:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:43:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-12 09:43:20,355 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2020-10-12 09:43:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:20,355 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-12 09:43:20,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:43:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-12 09:43:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:43:20,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:20,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:20,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:43:20,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash -861187893, now seen corresponding path program 2 times [2020-10-12 09:43:20,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:20,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840911935] [2020-10-12 09:43:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:22,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:22,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:43:22,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:43:22,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2320 [2020-10-12 09:43:22,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:22,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:43:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:22,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:22,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:22,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:22,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:22,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:22,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:22,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:22,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:43:22,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840911935] [2020-10-12 09:43:22,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:22,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:43:22,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586887988] [2020-10-12 09:43:22,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:22,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:22,754 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-12 09:43:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:23,030 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-12 09:43:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:43:23,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 09:43:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:23,032 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:43:23,036 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:43:23,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:43:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:43:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-12 09:43:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:43:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 09:43:23,054 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-12 09:43:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:23,055 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 09:43:23,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 09:43:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:43:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:23,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:23,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:43:23,057 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2014822795, now seen corresponding path program 3 times [2020-10-12 09:43:23,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:23,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472995504] [2020-10-12 09:43:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:23,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:24,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:24,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:43:24,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:43:24,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1596 [2020-10-12 09:43:24,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:43:24,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:24,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:24,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:24,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:24,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:24,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:24,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:43:24,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472995504] [2020-10-12 09:43:24,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:24,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:43:24,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248084701] [2020-10-12 09:43:24,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:24,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:24,734 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-12 09:43:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:24,914 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-12 09:43:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:43:24,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 09:43:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:24,915 INFO L225 Difference]: With dead ends: 51 [2020-10-12 09:43:24,916 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 09:43:24,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:43:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 09:43:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 09:43:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:43:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 09:43:24,922 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2020-10-12 09:43:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:24,923 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 09:43:24,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 09:43:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:43:24,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:24,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:24,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:43:24,925 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1640283643, now seen corresponding path program 4 times [2020-10-12 09:43:24,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:24,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702108785] [2020-10-12 09:43:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:26,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:27,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:27,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:29,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:29,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:43:29,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 09:43:29,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 09:43:29,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:43:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:43:29,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:31,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:31,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:31,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:31,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:31,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:31,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:31,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:31,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702108785] [2020-10-12 09:43:31,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:31,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:43:31,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14920630] [2020-10-12 09:43:31,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:43:31,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:43:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:43:31,629 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 26 states. [2020-10-12 09:43:32,019 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-12 09:43:32,209 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 09:43:32,449 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-12 09:43:32,807 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-12 09:43:33,034 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-12 09:43:33,330 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 09:43:33,650 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-12 09:43:33,820 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 09:43:34,593 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 40 [2020-10-12 09:43:35,035 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 09:43:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:35,505 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 09:43:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:43:35,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-10-12 09:43:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:35,508 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:43:35,508 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:43:35,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=330, Invalid=2022, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:43:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:43:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-12 09:43:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:43:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-12 09:43:35,519 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2020-10-12 09:43:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:35,519 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-12 09:43:35,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:43:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-12 09:43:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:43:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:35,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:35,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:43:35,521 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash 957569091, now seen corresponding path program 5 times [2020-10-12 09:43:35,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:35,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968109325] [2020-10-12 09:43:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:40,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:43:40,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:43:40,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:40,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:43:40,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:43:40,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:40,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:40,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:40,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:40,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:40,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:40,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:40,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:43:40,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968109325] [2020-10-12 09:43:40,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:40,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:40,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083668976] [2020-10-12 09:43:40,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:40,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:40,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:40,628 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 10 states. [2020-10-12 09:43:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:40,892 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-12 09:43:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:43:40,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 09:43:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:40,894 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:43:40,894 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 09:43:40,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:43:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 09:43:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-12 09:43:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:43:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-12 09:43:40,920 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 38 [2020-10-12 09:43:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:40,920 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-12 09:43:40,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-12 09:43:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:43:40,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:40,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:40,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:43:40,924 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash 15558915, now seen corresponding path program 6 times [2020-10-12 09:43:40,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:40,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021762820] [2020-10-12 09:43:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:40,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:43:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4052 [2020-10-12 09:43:44,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:43:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:45,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:45,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:45,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:45,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:43:45,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021762820] [2020-10-12 09:43:45,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:45,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:45,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516332318] [2020-10-12 09:43:45,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:45,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:45,068 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-12 09:43:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:45,400 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-12 09:43:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:43:45,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 09:43:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:45,402 INFO L225 Difference]: With dead ends: 63 [2020-10-12 09:43:45,402 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:43:45,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:43:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:43:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 09:43:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:43:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-12 09:43:45,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-10-12 09:43:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:45,420 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-12 09:43:45,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-12 09:43:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:43:45,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:45,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:45,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:43:45,425 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash 723988349, now seen corresponding path program 7 times [2020-10-12 09:43:45,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:45,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381407268] [2020-10-12 09:43:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:50,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:43:50,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-12 09:43:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:43:50,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:43:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:43:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:52,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381407268] [2020-10-12 09:43:52,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:52,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:43:52,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541582400] [2020-10-12 09:43:52,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:43:52,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:43:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:43:52,813 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 34 states. [2020-10-12 09:43:53,676 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-12 09:43:54,271 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-12 09:43:54,742 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-12 09:43:55,164 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 09:43:55,553 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-12 09:43:55,776 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 09:43:55,966 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-12 09:43:56,566 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-12 09:43:56,915 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 09:43:57,153 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 09:43:57,670 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-12 09:43:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:57,877 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-12 09:43:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:43:57,878 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-10-12 09:43:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:57,880 INFO L225 Difference]: With dead ends: 79 [2020-10-12 09:43:57,880 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:43:57,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:43:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:43:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-12 09:43:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:43:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-12 09:43:57,908 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 44 [2020-10-12 09:43:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:57,909 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-12 09:43:57,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:43:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-12 09:43:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:43:57,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:57,919 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:57,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:43:57,919 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash 985253819, now seen corresponding path program 8 times [2020-10-12 09:43:57,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:57,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093264274] [2020-10-12 09:43:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:02,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:02,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:03,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:03,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:03,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:03,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:44:03,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:03,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:44:03,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093264274] [2020-10-12 09:44:03,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:03,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:03,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968840500] [2020-10-12 09:44:03,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:03,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:03,034 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 12 states. [2020-10-12 09:44:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:03,382 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-10-12 09:44:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:44:03,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-12 09:44:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:03,385 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:44:03,385 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:44:03,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:44:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:44:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-12 09:44:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 09:44:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-12 09:44:03,411 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 46 [2020-10-12 09:44:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:03,411 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-12 09:44:03,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-12 09:44:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:44:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:03,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:03,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:44:03,413 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash 3766395, now seen corresponding path program 9 times [2020-10-12 09:44:03,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:03,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991387332] [2020-10-12 09:44:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:03,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:44:08,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:44:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:08,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:08,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:08,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:44:08,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991387332] [2020-10-12 09:44:08,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:08,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:08,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434501568] [2020-10-12 09:44:08,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:08,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:08,535 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-10-12 09:44:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:08,936 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-12 09:44:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:44:08,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-12 09:44:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:08,937 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:44:08,938 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:44:08,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:44:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 09:44:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:44:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-12 09:44:08,946 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 46 [2020-10-12 09:44:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:08,946 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-12 09:44:08,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-12 09:44:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:44:08,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:08,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:08,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:44:08,948 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:08,948 INFO L82 PathProgramCache]: Analyzing trace with hash 775128309, now seen corresponding path program 10 times [2020-10-12 09:44:08,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:08,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850590111] [2020-10-12 09:44:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:11,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:12,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:13,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:13,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:13,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:44:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:44:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:44:17,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850590111] [2020-10-12 09:44:17,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:17,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:44:17,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87156627] [2020-10-12 09:44:17,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:44:17,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:44:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:44:17,685 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 42 states. [2020-10-12 09:44:18,015 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-12 09:44:19,167 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 66 [2020-10-12 09:44:19,801 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-12 09:44:20,030 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-12 09:44:20,603 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-12 09:44:20,820 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 09:44:21,241 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2020-10-12 09:44:21,573 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-12 09:44:21,999 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-12 09:44:22,552 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2020-10-12 09:44:22,834 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-12 09:44:23,234 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-12 09:44:23,656 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2020-10-12 09:44:24,038 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-12 09:44:24,397 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 09:44:24,864 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 09:44:25,237 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-12 09:44:25,620 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-12 09:44:25,864 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 09:44:26,345 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2020-10-12 09:44:26,770 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2020-10-12 09:44:27,163 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-12 09:44:27,494 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 09:44:28,030 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 09:44:28,314 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-12 09:44:28,717 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-10-12 09:44:29,070 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2020-10-12 09:44:29,518 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 64 [2020-10-12 09:44:29,958 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 70 [2020-10-12 09:44:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:30,283 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-12 09:44:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 09:44:30,283 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 52 [2020-10-12 09:44:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:30,284 INFO L225 Difference]: With dead ends: 97 [2020-10-12 09:44:30,285 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:44:30,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=758, Invalid=5884, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 09:44:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:44:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-12 09:44:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:44:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-12 09:44:30,308 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 52 [2020-10-12 09:44:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:30,310 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-12 09:44:30,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:44:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-12 09:44:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:44:30,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:30,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:30,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:44:30,317 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1454530419, now seen corresponding path program 11 times [2020-10-12 09:44:30,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:30,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677534595] [2020-10-12 09:44:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:30,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:44:35,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:44:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:44:35,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:35,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:35,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:35,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:35,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:35,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:44:35,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677534595] [2020-10-12 09:44:35,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:35,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:44:35,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488226181] [2020-10-12 09:44:35,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:44:35,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:44:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:44:35,473 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 14 states. [2020-10-12 09:44:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:36,003 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-12 09:44:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:44:36,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-12 09:44:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:36,005 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:44:36,005 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:44:36,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:44:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:44:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-12 09:44:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 09:44:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-12 09:44:36,024 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 54 [2020-10-12 09:44:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:36,025 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-12 09:44:36,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:44:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-12 09:44:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:44:36,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:36,026 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:36,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:44:36,026 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 744746995, now seen corresponding path program 12 times [2020-10-12 09:44:36,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:36,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111577635] [2020-10-12 09:44:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:41,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:44:41,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:41,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:41,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:41,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:44:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111577635] [2020-10-12 09:44:41,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:41,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:44:41,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528456052] [2020-10-12 09:44:41,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:44:41,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:44:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:44:41,179 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-10-12 09:44:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:41,805 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-12 09:44:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:44:41,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-12 09:44:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:41,807 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:44:41,808 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:44:41,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:44:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:44:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 09:44:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:44:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-12 09:44:41,817 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 54 [2020-10-12 09:44:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-12 09:44:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:44:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-12 09:44:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:44:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:41,819 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:41,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:44:41,819 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash 97010285, now seen corresponding path program 13 times [2020-10-12 09:44:41,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:41,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045556320] [2020-10-12 09:44:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:46,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:44:46,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:44:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:44:46,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:46,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:44:46,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:46,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:44:46,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:48,787 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 09:44:48,974 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-12 09:44:49,784 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-12 09:44:50,178 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-12 09:44:50,381 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-12 09:44:50,611 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-12 09:44:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:52,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:52,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:52,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:52,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:52,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:52,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:44:52,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045556320] [2020-10-12 09:44:52,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:52,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:44:52,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318798397] [2020-10-12 09:44:52,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:44:52,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:52,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:44:52,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:44:52,949 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 49 states. [2020-10-12 09:44:53,220 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-12 09:44:54,357 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 84 [2020-10-12 09:44:54,615 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-12 09:44:54,848 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-12 09:44:55,184 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-12 09:44:55,894 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 120 [2020-10-12 09:44:56,216 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-12 09:44:56,895 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2020-10-12 09:44:57,474 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-10-12 09:44:58,064 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-12 09:44:58,398 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 09:44:58,712 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 09:44:58,960 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-12 09:44:59,630 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 80 [2020-10-12 09:44:59,868 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-12 09:45:00,107 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-12 09:45:00,934 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 121 [2020-10-12 09:45:01,597 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 113 [2020-10-12 09:45:02,018 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-12 09:45:02,411 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-12 09:45:02,786 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 09:45:04,195 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 134 [2020-10-12 09:45:04,934 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2020-10-12 09:45:05,363 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-12 09:45:05,838 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-12 09:45:06,238 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-12 09:45:06,669 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-12 09:45:06,994 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-12 09:45:07,504 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 82 [2020-10-12 09:45:08,001 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2020-10-12 09:45:08,506 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2020-10-12 09:45:09,142 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 74 [2020-10-12 09:45:09,722 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 71 [2020-10-12 09:45:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:10,256 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-10-12 09:45:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 09:45:10,258 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-12 09:45:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:10,259 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:45:10,259 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:45:10,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=998, Invalid=6658, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 09:45:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:45:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-12 09:45:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:45:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-12 09:45:10,275 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 60 [2020-10-12 09:45:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:10,275 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-12 09:45:10,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:45:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-12 09:45:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:45:10,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:10,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:10,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:45:10,277 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1608610069, now seen corresponding path program 14 times [2020-10-12 09:45:10,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:10,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186651159] [2020-10-12 09:45:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:10,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:12,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:15,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:45:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:45:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:45:15,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:15,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:15,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:15,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:15,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:45:15,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186651159] [2020-10-12 09:45:15,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:15,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:45:15,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149295354] [2020-10-12 09:45:15,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:45:15,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:45:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:15,626 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 16 states. [2020-10-12 09:45:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:16,844 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-10-12 09:45:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:45:16,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-12 09:45:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:16,849 INFO L225 Difference]: With dead ends: 158 [2020-10-12 09:45:16,849 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 09:45:16,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:45:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 09:45:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-12 09:45:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 09:45:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-10-12 09:45:16,896 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 62 [2020-10-12 09:45:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:16,896 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-10-12 09:45:16,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:45:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-10-12 09:45:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:45:16,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:16,902 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:16,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:45:16,903 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1171574635, now seen corresponding path program 15 times [2020-10-12 09:45:16,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:16,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378631234] [2020-10-12 09:45:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:21,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:45:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:22,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:22,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:22,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:22,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:22,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:22,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:22,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:22,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:22,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:45:22,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378631234] [2020-10-12 09:45:22,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:22,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:45:22,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880954248] [2020-10-12 09:45:22,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:45:22,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:45:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:22,296 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 16 states. [2020-10-12 09:45:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:23,662 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-12 09:45:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:45:23,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-12 09:45:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:23,665 INFO L225 Difference]: With dead ends: 99 [2020-10-12 09:45:23,665 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:45:23,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:45:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:45:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:45:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:45:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-12 09:45:23,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 62 [2020-10-12 09:45:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:23,679 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-12 09:45:23,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:45:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-12 09:45:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:45:23,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:23,681 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:23,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:45:23,681 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash 441280485, now seen corresponding path program 16 times [2020-10-12 09:45:23,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:23,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345404328] [2020-10-12 09:45:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:23,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:28,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5576 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:45:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:29,872 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-12 09:45:30,148 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-12 09:45:30,305 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-10-12 09:45:31,210 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-12 09:45:31,432 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-12 09:45:31,633 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-12 09:45:32,149 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 09:45:32,353 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-12 09:45:32,549 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 09:45:32,755 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-12 09:45:32,993 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 09:45:33,276 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-12 09:45:33,557 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 09:45:33,772 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-12 09:45:34,081 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-12 09:45:34,369 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-12 09:45:34,667 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 09:45:34,965 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-12 09:45:35,246 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-12 09:45:35,543 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 09:45:35,830 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-12 09:45:36,101 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 09:45:36,354 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-12 09:45:36,622 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-12 09:45:36,930 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 09:45:37,303 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-12 09:45:37,634 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-12 09:45:40,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:41,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:45:41,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345404328] [2020-10-12 09:45:41,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:41,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 09:45:41,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67747320] [2020-10-12 09:45:41,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 09:45:41,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:41,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 09:45:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:45:41,047 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 58 states. [2020-10-12 09:45:41,758 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 09:45:42,181 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 09:45:42,601 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 09:45:43,040 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 09:45:43,470 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 09:45:44,277 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2020-10-12 09:45:44,714 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 09:45:45,257 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-10-12 09:45:45,713 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-12 09:45:46,009 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-10-12 09:45:46,692 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2020-10-12 09:45:47,469 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-10-12 09:45:48,564 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2020-10-12 09:45:49,275 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 65 [2020-10-12 09:45:49,801 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2020-10-12 09:45:50,177 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-12 09:45:50,827 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-12 09:45:51,313 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2020-10-12 09:45:52,106 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2020-10-12 09:45:52,701 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2020-10-12 09:45:53,687 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-10-12 09:45:54,083 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-12 09:45:54,783 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-10-12 09:45:55,374 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-12 09:45:55,788 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-12 09:45:56,264 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-12 09:45:56,984 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 51 [2020-10-12 09:45:57,554 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 50 [2020-10-12 09:45:58,176 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-10-12 09:45:58,869 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2020-10-12 09:45:59,334 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 43 [2020-10-12 09:45:59,774 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-10-12 09:46:00,425 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-12 09:46:01,181 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-12 09:46:02,426 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-12 09:46:03,059 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 09:46:03,640 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 09:46:04,199 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 09:46:04,763 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-12 09:46:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:06,277 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-12 09:46:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 09:46:06,280 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 68 [2020-10-12 09:46:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:06,281 INFO L225 Difference]: With dead ends: 136 [2020-10-12 09:46:06,282 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 09:46:06,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=1202, Invalid=10354, Unknown=0, NotChecked=0, Total=11556 [2020-10-12 09:46:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 09:46:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-12 09:46:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:46:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-12 09:46:06,299 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 68 [2020-10-12 09:46:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:06,300 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-12 09:46:06,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 09:46:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-12 09:46:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:46:06,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:06,301 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:06,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:46:06,302 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:06,302 INFO L82 PathProgramCache]: Analyzing trace with hash -114063837, now seen corresponding path program 17 times [2020-10-12 09:46:06,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:06,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879912327] [2020-10-12 09:46:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 09:46:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:46:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:46:11,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879912327] [2020-10-12 09:46:11,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:11,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:46:11,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488738014] [2020-10-12 09:46:11,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:46:11,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:46:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:46:11,756 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 18 states. [2020-10-12 09:46:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:13,343 INFO L93 Difference]: Finished difference Result 192 states and 205 transitions. [2020-10-12 09:46:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:46:13,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 09:46:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:13,348 INFO L225 Difference]: With dead ends: 192 [2020-10-12 09:46:13,348 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:46:13,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:46:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:46:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-12 09:46:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:46:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-12 09:46:13,365 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 70 [2020-10-12 09:46:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:13,365 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-12 09:46:13,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:46:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-12 09:46:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:46:13,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:13,366 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:13,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:46:13,367 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash 385095395, now seen corresponding path program 18 times [2020-10-12 09:46:13,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:13,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36494414] [2020-10-12 09:46:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:13,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:18,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:46:18,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:46:18,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:19,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:19,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:19,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:19,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:19,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:46:19,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:46:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:46:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36494414] [2020-10-12 09:46:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:19,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:46:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869483533] [2020-10-12 09:46:19,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:46:19,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:46:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:46:19,105 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 18 states. [2020-10-12 09:46:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:21,481 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-10-12 09:46:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:46:21,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 09:46:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:21,485 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:46:21,486 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:46:21,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:46:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:46:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 09:46:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 09:46:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-12 09:46:21,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 70 [2020-10-12 09:46:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:21,500 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-12 09:46:21,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:46:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-12 09:46:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:46:21,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:21,501 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:21,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:46:21,502 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -567610019, now seen corresponding path program 19 times [2020-10-12 09:46:21,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:21,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541322586] [2020-10-12 09:46:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:21,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:25,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:26,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 09:46:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:46:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:46:26,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 09:46:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:46:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 09:46:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:27,157 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-10-12 09:46:27,307 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-12 09:46:27,596 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-12 09:46:28,466 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-12 09:46:28,739 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-12 09:46:29,232 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-12 09:46:29,477 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-12 09:46:29,761 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-12 09:46:30,036 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-12 09:46:30,385 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 09:46:31,191 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-12 09:46:31,515 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 09:46:31,817 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-12 09:46:32,158 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-12 09:46:32,563 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-12 09:46:33,098 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 09:46:33,686 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 09:46:34,481 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-12 09:46:34,950 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-12 09:46:35,433 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-12 09:46:35,951 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 09:46:36,441 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-12 09:46:37,307 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-12 09:46:37,806 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-12 09:46:38,424 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-12 09:46:38,939 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 09:46:39,449 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-12 09:46:39,962 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-12 09:46:40,573 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-12 09:46:44,270 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-10-12 09:46:44,736 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-12 09:46:45,220 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-10-12 09:46:45,743 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-12 09:46:48,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:48,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:48,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:48,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:46:48,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541322586] [2020-10-12 09:46:48,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:48,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 09:46:48,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637799885] [2020-10-12 09:46:48,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 09:46:48,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 09:46:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3883, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:46:48,525 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 64 states. [2020-10-12 09:46:50,692 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 09:46:51,743 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 09:46:52,888 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 09:46:53,823 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 09:46:54,757 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-12 09:46:55,791 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-12 09:46:58,811 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 155 DAG size of output: 134 [2020-10-12 09:46:59,257 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-12 09:47:00,201 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-12 09:47:00,960 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-12 09:47:01,571 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65