/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:21:36,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:21:36,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:21:36,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:21:36,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:21:36,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:21:36,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:21:36,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:21:36,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:21:36,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:21:36,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:21:36,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:21:36,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:21:36,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:21:36,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:21:36,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:21:36,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:21:36,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:21:36,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:21:36,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:21:36,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:21:36,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:21:36,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:21:36,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:21:36,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:21:36,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:21:36,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:21:36,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:21:36,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:21:36,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:21:36,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:21:36,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:21:36,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:21:36,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:21:36,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:21:36,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:21:36,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:21:36,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:21:36,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:21:36,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:21:36,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:21:36,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:21:36,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:21:36,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:21:36,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:21:36,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:21:36,385 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:21:36,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:21:36,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:21:36,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:21:36,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:21:36,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:21:36,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:21:36,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:21:36,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:21:36,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:21:36,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:21:36,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:21:36,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:21:36,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:21:36,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:21:36,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:21:36,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:21:36,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:21:36,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:21:36,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:21:36,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:21:36,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:21:36,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:21:36,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:21:36,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:21:36,703 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:21:36,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2020-10-12 16:21:36,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc0b51feb/cc2d3f412c5f404d83cca5a03efc1a40/FLAG233fd9f90 [2020-10-12 16:21:37,247 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:21:37,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2020-10-12 16:21:37,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc0b51feb/cc2d3f412c5f404d83cca5a03efc1a40/FLAG233fd9f90 [2020-10-12 16:21:37,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc0b51feb/cc2d3f412c5f404d83cca5a03efc1a40 [2020-10-12 16:21:37,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:21:37,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:21:37,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:21:37,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:21:37,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:21:37,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:37,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37, skipping insertion in model container [2020-10-12 16:21:37,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:37,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:21:37,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:21:37,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:21:37,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:21:37,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:21:37,932 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:21:37,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37 WrapperNode [2020-10-12 16:21:37,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:21:37,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:21:37,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:21:37,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:21:37,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:37,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... [2020-10-12 16:21:38,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:21:38,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:21:38,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:21:38,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:21:38,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2020-10-12 16:21:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2020-10-12 16:21:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:21:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:21:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:21:38,354 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:21:38,355 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:21:38,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:21:38 BoogieIcfgContainer [2020-10-12 16:21:38,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:21:38,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:21:38,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:21:38,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:21:38,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:21:37" (1/3) ... [2020-10-12 16:21:38,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecea491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:21:38, skipping insertion in model container [2020-10-12 16:21:38,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:21:37" (2/3) ... [2020-10-12 16:21:38,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecea491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:21:38, skipping insertion in model container [2020-10-12 16:21:38,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:21:38" (3/3) ... [2020-10-12 16:21:38,369 INFO L109 eAbstractionObserver]: Analyzing ICFG watermelon.c [2020-10-12 16:21:38,383 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:21:38,393 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:21:38,409 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:21:38,439 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:21:38,439 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:21:38,439 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:21:38,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:21:38,440 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:21:38,440 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:21:38,440 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:21:38,440 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:21:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-12 16:21:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:21:38,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:38,472 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] [2020-10-12 16:21:38,473 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2139742967, now seen corresponding path program 1 times [2020-10-12 16:21:38,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:38,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840676742] [2020-10-12 16:21:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:38,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:21:39,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-12 16:21:39,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:21:39,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:21:39,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:21:39,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:21:39,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:39,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:39,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:21:39,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:39,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:21:39,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 16:21:39,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:39,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:39,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 16:21:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:21:39,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 16:21:39,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:21:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:39,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:21:39,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:39,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840676742] [2020-10-12 16:21:39,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:39,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 16:21:39,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810166598] [2020-10-12 16:21:39,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:21:39,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:21:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:21:39,648 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 13 states. [2020-10-12 16:21:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:40,301 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2020-10-12 16:21:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:21:40,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 16:21:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:40,317 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:21:40,317 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:21:40,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:21:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:21:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 16:21:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:21:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-12 16:21:40,376 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2020-10-12 16:21:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:40,377 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-12 16:21:40,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:21:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-12 16:21:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:21:40,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:40,380 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] [2020-10-12 16:21:40,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:21:40,381 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -951333161, now seen corresponding path program 1 times [2020-10-12 16:21:40,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:40,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96235347] [2020-10-12 16:21:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:40,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:40,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:21:40,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:40,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-12 16:21:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:21:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:21:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:40,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:40,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:40,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:40,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:40,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:40,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:40,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:40,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:21:40,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 16:21:40,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:21:40,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 16:21:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:40,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:40,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 16:21:40,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:40,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 16:21:40,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:21:40,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:40,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96235347] [2020-10-12 16:21:40,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:40,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 16:21:40,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896069834] [2020-10-12 16:21:40,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:21:40,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:21:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:21:40,738 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 8 states. [2020-10-12 16:21:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:40,952 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-12 16:21:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:21:40,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 16:21:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:40,954 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:21:40,954 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:21:40,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:21:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:21:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-12 16:21:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:21:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-12 16:21:40,966 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2020-10-12 16:21:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:40,967 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-12 16:21:40,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:21:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-12 16:21:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:21:40,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:40,968 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] [2020-10-12 16:21:40,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:21:40,969 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 438513435, now seen corresponding path program 1 times [2020-10-12 16:21:40,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:40,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-10-12 16:21:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:21:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 16:21:41,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:21:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:21:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:41,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:41,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:41,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:41,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 16:21:41,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:41,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 16:21:41,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:41,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:41,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:21:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 16:21:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:21:41,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:41,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 16:21:41,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:21:41,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-10-12 16:21:41,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:41,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 16:21:41,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724288058] [2020-10-12 16:21:41,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:21:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:21:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:21:41,255 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-12 16:21:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:41,475 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-12 16:21:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:21:41,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 16:21:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:41,477 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:21:41,477 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:21:41,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:21:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:21:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:21:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:21:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-12 16:21:41,486 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-10-12 16:21:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:41,487 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-12 16:21:41,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:21:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-12 16:21:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:21:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:41,489 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, 1] [2020-10-12 16:21:41,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:21:41,489 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 551084075, now seen corresponding path program 1 times [2020-10-12 16:21:41,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:41,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691311808] [2020-10-12 16:21:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:21:41,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 16:21:41,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 16:21:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:41,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:41,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:41,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:41,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:41,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:41,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 16:21:41,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:41,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 16:21:41,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 16:21:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 16:21:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 16:21:41,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:41,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 16:21:41,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 16:21:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:41,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691311808] [2020-10-12 16:21:41,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:41,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:21:41,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944224141] [2020-10-12 16:21:41,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:21:41,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:21:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:21:41,661 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-12 16:21:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:41,754 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-12 16:21:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:21:41,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-12 16:21:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:41,755 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:21:41,755 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:21:41,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:21:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:21:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-12 16:21:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:21:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-12 16:21:41,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2020-10-12 16:21:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:41,765 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-12 16:21:41,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:21:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-12 16:21:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:21:41,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:41,766 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, 1, 1, 1, 1, 1] [2020-10-12 16:21:41,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:21:41,767 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash 938493323, now seen corresponding path program 1 times [2020-10-12 16:21:41,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:41,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123975893] [2020-10-12 16:21:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:21:41,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-12 16:21:41,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:21:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 16:21:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:21:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:41,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:41,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:41,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:41,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:41,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 16:21:41,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 16:21:41,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:21:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 16:21:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:21:41,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:41,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 16:21:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 16:21:42,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 16:21:42,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:21:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 16:21:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:21:42,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:42,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123975893] [2020-10-12 16:21:42,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:42,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:21:42,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655584605] [2020-10-12 16:21:42,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:21:42,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:21:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:21:42,041 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-10-12 16:21:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:42,214 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-10-12 16:21:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:21:42,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-12 16:21:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:42,216 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:21:42,216 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:21:42,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:21:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:21:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-12 16:21:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:21:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-12 16:21:42,226 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 33 [2020-10-12 16:21:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:42,226 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-12 16:21:42,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:21:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-12 16:21:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:21:42,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:42,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:42,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:21:42,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash -645254165, now seen corresponding path program 2 times [2020-10-12 16:21:42,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:42,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162495533] [2020-10-12 16:21:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:42,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:21:42,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:42,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-12 16:21:42,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:21:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:21:42,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:42,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:42,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:42,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:42,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:42,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:42,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:42,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 16:21:42,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:21:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:42,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:21:42,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 16:21:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:42,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:21:42,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:21:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:21:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162495533] [2020-10-12 16:21:42,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:42,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:21:42,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518641985] [2020-10-12 16:21:42,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:21:42,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:21:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:21:42,858 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 14 states. [2020-10-12 16:21:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:43,378 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-12 16:21:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:21:43,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 16:21:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:43,381 INFO L225 Difference]: With dead ends: 76 [2020-10-12 16:21:43,381 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:21:43,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:21:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:21:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-10-12 16:21:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:21:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-12 16:21:43,394 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 37 [2020-10-12 16:21:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:43,394 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-12 16:21:43,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:21:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-12 16:21:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:21:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:43,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:43,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:21:43,397 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1106457817, now seen corresponding path program 1 times [2020-10-12 16:21:43,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:43,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106634416] [2020-10-12 16:21:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:43,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:21:43,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:21:43,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-12 16:21:43,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:21:43,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:43,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:21:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:43,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:43,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:43,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:43,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:43,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 16:21:43,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:21:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:21:43,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 16:21:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:44,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:44,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 16:21:44,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:21:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:21:44,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:44,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106634416] [2020-10-12 16:21:44,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:44,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:21:44,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596730954] [2020-10-12 16:21:44,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:21:44,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:21:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:21:44,255 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 14 states. [2020-10-12 16:21:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:44,649 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-12 16:21:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:21:44,649 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 16:21:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:44,651 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:21:44,651 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:21:44,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:21:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:21:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-12 16:21:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:21:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-12 16:21:44,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 37 [2020-10-12 16:21:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:44,664 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-12 16:21:44,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:21:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-12 16:21:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:21:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:44,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:44,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:21:44,667 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:44,667 INFO L82 PathProgramCache]: Analyzing trace with hash -426399447, now seen corresponding path program 1 times [2020-10-12 16:21:44,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:44,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804081111] [2020-10-12 16:21:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:44,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:21:44,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:44,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-12 16:21:44,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:44,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:21:44,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 16:21:44,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:21:44,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:44,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:44,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:44,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:44,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:44,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:44,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:44,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:44,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 16:21:44,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:21:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:21:44,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 16:21:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:44,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:44,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 16:21:44,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 16:21:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:21:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:21:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:21:44,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804081111] [2020-10-12 16:21:44,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:44,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 16:21:44,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833060129] [2020-10-12 16:21:44,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:21:44,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:21:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:21:44,953 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 13 states. [2020-10-12 16:21:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:45,342 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-10-12 16:21:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:21:45,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-12 16:21:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:45,344 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:21:45,344 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:21:45,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:21:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:21:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-12 16:21:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:21:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-12 16:21:45,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 37 [2020-10-12 16:21:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:45,352 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-12 16:21:45,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:21:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-12 16:21:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:21:45,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:45,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:45,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:21:45,354 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash -217060533, now seen corresponding path program 3 times [2020-10-12 16:21:45,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:45,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863701687] [2020-10-12 16:21:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:45,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:21:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:21:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:21:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:21:45,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:45,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:45,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:45,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:45,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:45,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:45,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:21:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 16:21:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:45,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:45,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 16:21:45,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:21:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863701687] [2020-10-12 16:21:45,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:45,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:21:45,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332758308] [2020-10-12 16:21:45,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:21:45,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:21:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:21:45,832 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2020-10-12 16:21:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:46,343 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-12 16:21:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:21:46,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-12 16:21:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:46,347 INFO L225 Difference]: With dead ends: 80 [2020-10-12 16:21:46,347 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:21:46,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:21:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:21:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-10-12 16:21:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:21:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-12 16:21:46,363 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2020-10-12 16:21:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:46,364 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-12 16:21:46,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:21:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-12 16:21:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:21:46,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:46,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:46,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:21:46,366 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1031132409, now seen corresponding path program 2 times [2020-10-12 16:21:46,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:46,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746893953] [2020-10-12 16:21:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:46,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:21:46,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:46,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 16:21:46,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:21:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:21:46,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:46,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:46,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:46,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:46,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:46,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:46,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:46,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:46,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:46,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:46,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 16:21:46,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:46,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:21:46,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 16:21:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:46,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:46,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:46,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 16:21:46,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:21:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:46,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746893953] [2020-10-12 16:21:46,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:46,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:21:46,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680242427] [2020-10-12 16:21:46,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:21:46,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:21:46,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:21:46,913 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2020-10-12 16:21:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:47,410 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-12 16:21:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:21:47,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-12 16:21:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:47,412 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:21:47,412 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:21:47,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:21:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:21:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-10-12 16:21:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:21:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-12 16:21:47,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2020-10-12 16:21:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:47,429 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-12 16:21:47,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:21:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-12 16:21:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:21:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:47,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:47,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:21:47,430 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash 958358477, now seen corresponding path program 4 times [2020-10-12 16:21:47,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:47,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535845243] [2020-10-12 16:21:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:47,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:21:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:47,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:47,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:47,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:47,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:47,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:47,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:47,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:47,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:47,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:47,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 16:21:47,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:21:47,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:47,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 16:21:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:47,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:47,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:47,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:47,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-12 16:21:47,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:47,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:47,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:21:47,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:48,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535845243] [2020-10-12 16:21:48,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:48,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:21:48,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965904841] [2020-10-12 16:21:48,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:21:48,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:21:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:21:48,045 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 17 states. [2020-10-12 16:21:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:48,460 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-12 16:21:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:21:48,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-12 16:21:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:48,462 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:21:48,462 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:21:48,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:21:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:21:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-12 16:21:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:21:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-12 16:21:48,470 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2020-10-12 16:21:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:48,471 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-12 16:21:48,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:21:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-12 16:21:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:21:48,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:48,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:48,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:21:48,472 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061211, now seen corresponding path program 3 times [2020-10-12 16:21:48,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:48,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796353229] [2020-10-12 16:21:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:48,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:48,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:48,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:21:48,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:48,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-12 16:21:48,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:48,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:21:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:21:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:48,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:48,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:48,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:48,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:48,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:48,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:48,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:48,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 16:21:48,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:48,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:48,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:48,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:21:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 16:21:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:21:48,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 16:21:48,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:21:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:21:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:49,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796353229] [2020-10-12 16:21:49,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:49,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:21:49,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262721349] [2020-10-12 16:21:49,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:21:49,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:21:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:21:49,016 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 17 states. [2020-10-12 16:21:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:49,409 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-12 16:21:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:21:49,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-12 16:21:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:49,410 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:21:49,410 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:21:49,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:21:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:21:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-12 16:21:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:21:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-12 16:21:49,420 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2020-10-12 16:21:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:49,421 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-12 16:21:49,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:21:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-12 16:21:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:21:49,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:49,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2020-10-12 16:21:49,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:21:49,422 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2094705579, now seen corresponding path program 5 times [2020-10-12 16:21:49,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:49,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473400979] [2020-10-12 16:21:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:21:49,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-12 16:21:49,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:21:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:21:49,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:49,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:49,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:49,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:49,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-12 16:21:49,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:49,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:49,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:21:49,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:49,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 16:21:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:49,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:21:49,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:49,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473400979] [2020-10-12 16:21:49,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:49,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:21:49,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956484037] [2020-10-12 16:21:50,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:21:50,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:21:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:21:50,001 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 18 states. [2020-10-12 16:21:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:50,590 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-12 16:21:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:21:50,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-12 16:21:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:50,592 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:21:50,592 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:21:50,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:21:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:21:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2020-10-12 16:21:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:21:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-12 16:21:50,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2020-10-12 16:21:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:50,603 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-12 16:21:50,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:21:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-12 16:21:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:21:50,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:50,604 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2020-10-12 16:21:50,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:21:50,604 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686823, now seen corresponding path program 4 times [2020-10-12 16:21:50,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:50,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666402090] [2020-10-12 16:21:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:50,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:50,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:21:50,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-12 16:21:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:21:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:21:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:50,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:50,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:50,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:50,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:50,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:50,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:50,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:50,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:50,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:50,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:50,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:50,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:21:50,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:50,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 16:21:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:51,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:51,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:51,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:21:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:51,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666402090] [2020-10-12 16:21:51,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:51,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:21:51,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654945513] [2020-10-12 16:21:51,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:21:51,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:51,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:21:51,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:21:51,152 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 18 states. [2020-10-12 16:21:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:51,732 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-12 16:21:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:21:51,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-12 16:21:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:51,734 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:21:51,734 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:21:51,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:21:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:21:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-12 16:21:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:21:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-12 16:21:51,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2020-10-12 16:21:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:51,742 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-12 16:21:51,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:21:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-12 16:21:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:21:51,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:51,743 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1] [2020-10-12 16:21:51,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:21:51,743 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2067500077, now seen corresponding path program 6 times [2020-10-12 16:21:51,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:51,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770644700] [2020-10-12 16:21:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:21:52,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:52,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:52,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:52,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:52,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:52,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:21:52,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 16:21:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:52,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:21:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:52,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770644700] [2020-10-12 16:21:52,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:52,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:21:52,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44919769] [2020-10-12 16:21:52,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:21:52,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:21:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:21:52,465 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 19 states. [2020-10-12 16:21:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:53,102 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-10-12 16:21:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:21:53,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 16:21:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:53,104 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:21:53,104 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:21:53,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:21:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:21:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-12 16:21:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:21:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-12 16:21:53,120 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2020-10-12 16:21:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:53,122 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-12 16:21:53,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:21:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-12 16:21:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:21:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:53,125 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1] [2020-10-12 16:21:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:21:53,125 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1710408635, now seen corresponding path program 5 times [2020-10-12 16:21:53,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:53,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378457971] [2020-10-12 16:21:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:53,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:53,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:53,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:53,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:21:53,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:21:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:53,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:53,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:53,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:53,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:53,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:53,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:53,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:53,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:53,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:53,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:53,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:53,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:53,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:53,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:53,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 16:21:53,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:21:53,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 16:21:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:53,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:53,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:21:53,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 16:21:53,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:53,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:53,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:53,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:21:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:53,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378457971] [2020-10-12 16:21:53,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:53,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:21:53,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018538142] [2020-10-12 16:21:53,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:21:53,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:21:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:21:53,978 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 19 states. [2020-10-12 16:21:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:54,452 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-12 16:21:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:21:54,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 16:21:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:54,453 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:21:54,454 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:21:54,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:21:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:21:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-12 16:21:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:21:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-12 16:21:54,461 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2020-10-12 16:21:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:54,461 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-12 16:21:54,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:21:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-12 16:21:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:21:54,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:54,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1] [2020-10-12 16:21:54,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:21:54,463 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1580446987, now seen corresponding path program 7 times [2020-10-12 16:21:54,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:54,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6401582] [2020-10-12 16:21:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:21:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:21:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:54,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:54,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:54,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:54,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:54,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:54,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:54,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:54,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:21:54,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:21:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:54,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 16:21:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:54,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:54,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:21:54,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:54,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:54,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:21:54,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:55,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6401582] [2020-10-12 16:21:55,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:55,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:21:55,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483798177] [2020-10-12 16:21:55,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:21:55,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:21:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:21:55,133 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 20 states. [2020-10-12 16:21:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:56,310 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-12 16:21:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:21:56,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-12 16:21:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:56,312 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:21:56,312 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:21:56,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:21:56,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:21:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-12 16:21:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:21:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-12 16:21:56,322 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2020-10-12 16:21:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:56,322 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-12 16:21:56,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:21:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-12 16:21:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:21:56,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:56,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1] [2020-10-12 16:21:56,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:21:56,323 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:56,324 INFO L82 PathProgramCache]: Analyzing trace with hash 390915527, now seen corresponding path program 6 times [2020-10-12 16:21:56,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:56,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952324041] [2020-10-12 16:21:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:21:56,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 16:21:56,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:21:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:21:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:56,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:56,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:21:56,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:21:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 16:21:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:56,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 16:21:56,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:21:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:57,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952324041] [2020-10-12 16:21:57,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:57,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:21:57,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594057178] [2020-10-12 16:21:57,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:21:57,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:21:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:21:57,039 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 20 states. [2020-10-12 16:21:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:57,969 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-12 16:21:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:21:57,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-12 16:21:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:57,971 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:21:57,971 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:21:57,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:21:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:21:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-10-12 16:21:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:21:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-12 16:21:57,979 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2020-10-12 16:21:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:57,980 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-12 16:21:57,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:21:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-12 16:21:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:21:57,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:57,981 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1] [2020-10-12 16:21:57,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:21:57,981 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1786232205, now seen corresponding path program 8 times [2020-10-12 16:21:57,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:57,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112807540] [2020-10-12 16:21:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:57,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:58,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:21:58,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:58,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:21:58,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:21:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:21:58,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:58,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:58,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:58,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:58,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:21:58,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:58,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 16:21:58,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:21:58,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:58,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:21:58,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:58,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 16:21:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:21:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 16:21:58,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:21:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:21:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:21:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:21:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:58,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112807540] [2020-10-12 16:21:58,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:58,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:21:58,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407888474] [2020-10-12 16:21:58,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:21:58,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:21:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:21:58,790 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 21 states. [2020-10-12 16:21:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:59,493 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-12 16:21:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:21:59,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-12 16:21:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:59,494 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:21:59,494 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:21:59,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:21:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:21:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-12 16:21:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:21:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-12 16:21:59,506 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2020-10-12 16:21:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:59,507 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-12 16:21:59,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:21:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-12 16:21:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:21:59,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:59,511 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1] [2020-10-12 16:21:59,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:21:59,512 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash 484331301, now seen corresponding path program 7 times [2020-10-12 16:21:59,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:59,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657878778] [2020-10-12 16:21:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:59,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:21:59,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-12 16:21:59,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:21:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:21:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:59,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:59,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:59,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:59,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:59,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:00,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:00,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:00,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:22:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:00,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 16:22:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:00,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:00,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:00,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:22:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:22:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:00,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657878778] [2020-10-12 16:22:00,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:00,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:22:00,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31881534] [2020-10-12 16:22:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:22:00,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:22:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:22:00,298 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 21 states. [2020-10-12 16:22:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:00,824 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-12 16:22:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:22:00,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-12 16:22:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:00,826 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:22:00,826 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:22:00,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:22:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:22:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-12 16:22:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:22:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-12 16:22:00,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2020-10-12 16:22:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:00,838 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-12 16:22:00,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:22:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-12 16:22:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:22:00,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:00,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1] [2020-10-12 16:22:00,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:22:00,839 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1364477803, now seen corresponding path program 9 times [2020-10-12 16:22:00,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:00,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85884696] [2020-10-12 16:22:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:01,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:01,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:22:01,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 16:22:01,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:22:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:22:01,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:01,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:01,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:01,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:01,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:01,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:22:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:01,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 16:22:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:01,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:01,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:22:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:01,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85884696] [2020-10-12 16:22:01,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:01,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:22:01,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438706800] [2020-10-12 16:22:01,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:22:01,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:22:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:22:01,509 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 22 states. [2020-10-12 16:22:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:02,626 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-10-12 16:22:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:22:02,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-12 16:22:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:02,628 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:22:02,628 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:22:02,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:22:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:22:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2020-10-12 16:22:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:22:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-12 16:22:02,638 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2020-10-12 16:22:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:02,638 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-12 16:22:02,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:22:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-12 16:22:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:22:02,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:02,639 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1] [2020-10-12 16:22:02,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:22:02,639 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 707051687, now seen corresponding path program 8 times [2020-10-12 16:22:02,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:02,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388436364] [2020-10-12 16:22:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:02,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:22:02,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 16:22:02,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:22:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:22:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:02,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:02,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:02,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:02,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:02,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:02,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:02,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:02,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:22:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:03,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 16:22:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:03,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:03,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-12 16:22:03,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:03,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:22:03,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:03,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388436364] [2020-10-12 16:22:03,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:03,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:22:03,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47251297] [2020-10-12 16:22:03,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:22:03,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:22:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:22:03,392 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 22 states. [2020-10-12 16:22:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:04,383 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-12 16:22:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:22:04,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-12 16:22:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:04,386 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:22:04,386 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:22:04,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:22:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:22:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-10-12 16:22:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:22:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-12 16:22:04,396 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2020-10-12 16:22:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:04,397 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-12 16:22:04,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:22:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-12 16:22:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:22:04,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:04,399 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 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, 1] [2020-10-12 16:22:04,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:22:04,399 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:04,400 INFO L82 PathProgramCache]: Analyzing trace with hash 398276589, now seen corresponding path program 10 times [2020-10-12 16:22:04,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:04,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934967499] [2020-10-12 16:22:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:04,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:04,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:04,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:22:04,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-12 16:22:04,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:22:04,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:04,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:22:04,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:04,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:04,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:04,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:04,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:04,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:04,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:04,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:04,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:04,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:04,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:04,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:22:04,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:05,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 16:22:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:05,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:05,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:05,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-12 16:22:05,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:22:05,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:05,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934967499] [2020-10-12 16:22:05,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:05,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:22:05,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247159595] [2020-10-12 16:22:05,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:22:05,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:05,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:22:05,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:22:05,490 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 23 states. [2020-10-12 16:22:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:06,322 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-12 16:22:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:22:06,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-12 16:22:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:06,324 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:22:06,325 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:22:06,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=1476, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:22:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:22:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-12 16:22:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:22:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-12 16:22:06,333 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2020-10-12 16:22:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:06,334 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-12 16:22:06,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:22:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-12 16:22:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:22:06,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:06,335 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 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, 1] [2020-10-12 16:22:06,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:22:06,335 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash -872002811, now seen corresponding path program 9 times [2020-10-12 16:22:06,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:06,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068724968] [2020-10-12 16:22:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:06,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:06,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:22:06,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:06,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-12 16:22:06,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:22:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:22:06,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:06,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:06,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:06,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:06,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:06,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:06,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:06,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:06,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:06,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:06,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:06,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:06,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:06,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:06,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 16:22:06,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:22:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:06,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 16:22:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:07,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:07,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:22:07,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:07,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:22:07,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:22:07,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:07,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:22:07,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:07,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068724968] [2020-10-12 16:22:07,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:07,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:22:07,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523287256] [2020-10-12 16:22:07,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:22:07,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:22:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:22:07,273 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 23 states. [2020-10-12 16:22:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:08,196 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2020-10-12 16:22:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:22:08,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-12 16:22:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:08,198 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:22:08,198 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:22:08,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:22:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:22:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-12 16:22:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:22:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-12 16:22:08,206 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2020-10-12 16:22:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:08,207 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-12 16:22:08,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:22:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-12 16:22:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:22:08,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:08,208 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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, 1] [2020-10-12 16:22:08,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:22:08,208 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash -949640501, now seen corresponding path program 11 times [2020-10-12 16:22:08,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:08,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598166406] [2020-10-12 16:22:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:08,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:08,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:22:08,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:08,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-12 16:22:08,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:08,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:22:08,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:08,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:22:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:08,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:08,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:08,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:08,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:08,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:08,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:08,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:22:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:08,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 16:22:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:08,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:22:08,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:08,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598166406] [2020-10-12 16:22:08,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:08,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:22:08,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601333436] [2020-10-12 16:22:08,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:22:08,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:22:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:22:08,943 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 24 states. [2020-10-12 16:22:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:09,946 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-12 16:22:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:22:09,953 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-12 16:22:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:09,954 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:22:09,954 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:22:09,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:22:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:22:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-12 16:22:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:22:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-12 16:22:09,965 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2020-10-12 16:22:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:09,966 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-12 16:22:09,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:22:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-12 16:22:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:22:09,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:09,967 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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, 1] [2020-10-12 16:22:09,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:22:09,967 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1354939257, now seen corresponding path program 10 times [2020-10-12 16:22:09,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:09,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178485471] [2020-10-12 16:22:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:09,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:10,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:22:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:10,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:22:10,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:10,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:10,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:10,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:10,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:10,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:10,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:10,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:10,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:10,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:10,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 16:22:10,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:10,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:10,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:22:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:10,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 16:22:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:10,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:10,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:10,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:10,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:10,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 16:22:10,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:10,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:22:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:10,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178485471] [2020-10-12 16:22:10,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:10,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:22:10,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945684037] [2020-10-12 16:22:10,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:22:10,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:22:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:22:10,702 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 24 states. [2020-10-12 16:22:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:11,801 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-12 16:22:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:22:11,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-12 16:22:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:11,803 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:22:11,803 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:22:11,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:22:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:22:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-10-12 16:22:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:22:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-12 16:22:11,813 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2020-10-12 16:22:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:11,813 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-12 16:22:11,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:22:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-12 16:22:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:22:11,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:11,814 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 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, 1] [2020-10-12 16:22:11,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:22:11,815 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1323645773, now seen corresponding path program 12 times [2020-10-12 16:22:11,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:11,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438329527] [2020-10-12 16:22:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:12,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:12,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:22:12,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:12,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-12 16:22:12,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:22:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:22:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:12,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:12,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:12,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:12,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:12,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:12,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:12,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:12,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:22:12,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:22:12,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 16:22:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:12,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:12,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:12,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:12,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-12 16:22:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:22:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:12,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438329527] [2020-10-12 16:22:12,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:12,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:22:12,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742066682] [2020-10-12 16:22:12,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:22:12,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:22:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:22:12,710 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 25 states. [2020-10-12 16:22:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:13,395 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-12 16:22:13,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:22:13,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-12 16:22:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:13,397 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:22:13,398 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:22:13,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:22:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:22:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-12 16:22:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:22:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-12 16:22:13,409 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2020-10-12 16:22:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:13,409 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-12 16:22:13,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:22:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-12 16:22:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:22:13,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:13,411 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 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, 1] [2020-10-12 16:22:13,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:22:13,411 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 376860645, now seen corresponding path program 11 times [2020-10-12 16:22:13,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:13,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885840541] [2020-10-12 16:22:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:13,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:13,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:22:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:13,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:13,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:13,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:13,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:13,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:13,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:13,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 16:22:13,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:22:13,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 16:22:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:14,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:14,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:22:14,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 16:22:14,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:22:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:14,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885840541] [2020-10-12 16:22:14,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:14,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:22:14,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034889909] [2020-10-12 16:22:14,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:22:14,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:22:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:22:14,560 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 25 states. [2020-10-12 16:22:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:15,389 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-12 16:22:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:22:15,389 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-12 16:22:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:15,390 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:22:15,390 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:22:15,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:22:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:22:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-10-12 16:22:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:22:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-12 16:22:15,403 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2020-10-12 16:22:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:15,404 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-12 16:22:15,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:22:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-12 16:22:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:22:15,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:15,405 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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, 1] [2020-10-12 16:22:15,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:22:15,405 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash -863959253, now seen corresponding path program 13 times [2020-10-12 16:22:15,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:15,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912884017] [2020-10-12 16:22:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:22:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:15,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:15,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:15,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:22:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 16:22:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:22:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:16,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912884017] [2020-10-12 16:22:16,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:16,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:22:16,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137038989] [2020-10-12 16:22:16,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:22:16,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:22:16,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:22:16,276 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 26 states. [2020-10-12 16:22:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:17,719 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-12 16:22:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:22:17,724 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-12 16:22:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:17,725 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:22:17,726 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:22:17,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:22:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:22:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-12 16:22:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:22:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-12 16:22:17,739 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2020-10-12 16:22:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:17,739 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-12 16:22:17,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:22:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-12 16:22:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:22:17,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:17,740 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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, 1] [2020-10-12 16:22:17,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:22:17,741 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 506966375, now seen corresponding path program 12 times [2020-10-12 16:22:17,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:17,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220536949] [2020-10-12 16:22:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:17,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:17,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:17,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:22:17,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:17,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-12 16:22:17,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:22:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:22:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:18,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:18,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:18,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:18,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:18,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:18,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:18,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:18,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:18,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:18,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:18,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-12 16:22:18,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:22:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:18,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 16:22:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:18,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:18,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:18,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-12 16:22:18,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:22:18,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:18,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220536949] [2020-10-12 16:22:18,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:18,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:22:18,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970725398] [2020-10-12 16:22:18,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:22:18,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:22:18,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:22:18,593 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 26 states. [2020-10-12 16:22:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:19,877 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-12 16:22:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:22:19,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-12 16:22:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:19,880 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:22:19,880 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:22:19,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=2806, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:22:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:22:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-12 16:22:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:22:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-12 16:22:19,894 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2020-10-12 16:22:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:19,895 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-12 16:22:19,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:22:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-12 16:22:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:22:19,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:19,897 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 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, 1] [2020-10-12 16:22:19,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:22:19,898 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2058946477, now seen corresponding path program 14 times [2020-10-12 16:22:19,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:19,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109328018] [2020-10-12 16:22:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:19,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:22:20,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:20,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 16:22:20,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:22:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:22:20,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:20,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:20,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:20,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:20,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:20,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:20,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:20,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:20,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:20,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:22:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 16:22:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:20,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:20,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 16:22:20,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:20,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:20,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:22:20,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:20,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109328018] [2020-10-12 16:22:20,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:20,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:22:20,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322761022] [2020-10-12 16:22:20,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:22:20,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:22:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:22:20,781 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 27 states. [2020-10-12 16:22:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:21,523 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-12 16:22:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:22:21,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-12 16:22:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:21,525 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:22:21,526 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:22:21,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:22:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:22:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-12 16:22:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:22:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-12 16:22:21,535 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2020-10-12 16:22:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:21,535 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-12 16:22:21,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:22:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-12 16:22:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:22:21,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:21,536 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 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, 1] [2020-10-12 16:22:21,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:22:21,537 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1542455867, now seen corresponding path program 13 times [2020-10-12 16:22:21,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:21,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634514498] [2020-10-12 16:22:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:21,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:21,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:21,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:21,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:22:21,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:21,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-12 16:22:21,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:22:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:22:21,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:22,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:22,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:22,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:22,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:22,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:22,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:22:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:22,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 16:22:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:22,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:22,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:22:22,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:22,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 16:22:22,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:22:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:22:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:22,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634514498] [2020-10-12 16:22:22,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:22,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:22:22,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648065811] [2020-10-12 16:22:22,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:22:22,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:22:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:22:22,598 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 27 states. [2020-10-12 16:22:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:23,589 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-12 16:22:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:22:23,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-12 16:22:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:23,591 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:22:23,591 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:22:23,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:22:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:22:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-12 16:22:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:22:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-12 16:22:23,608 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2020-10-12 16:22:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:23,609 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-12 16:22:23,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:22:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-12 16:22:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:22:23,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:23,610 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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, 1] [2020-10-12 16:22:23,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:22:23,610 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash -340806517, now seen corresponding path program 15 times [2020-10-12 16:22:23,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:23,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117028250] [2020-10-12 16:22:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:23,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:23,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:22:23,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:23,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:23,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:23,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:23,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:23,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:23,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:23,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:22:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 16:22:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:24,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:24,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:24,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:22:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117028250] [2020-10-12 16:22:24,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:24,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:22:24,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911947859] [2020-10-12 16:22:24,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:22:24,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:22:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:22:24,504 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 28 states. [2020-10-12 16:22:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:26,245 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-12 16:22:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:22:26,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-12 16:22:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:26,247 INFO L225 Difference]: With dead ends: 100 [2020-10-12 16:22:26,247 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:22:26,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=3361, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:22:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:22:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2020-10-12 16:22:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:22:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-12 16:22:26,259 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2020-10-12 16:22:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:26,259 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-12 16:22:26,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:22:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-12 16:22:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:22:26,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:26,260 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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, 1] [2020-10-12 16:22:26,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:22:26,261 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1415231673, now seen corresponding path program 14 times [2020-10-12 16:22:26,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:26,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952863331] [2020-10-12 16:22:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:26,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:22:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-12 16:22:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:22:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:22:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:26,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:26,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:26,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:26,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:26,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:26,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:26,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:26,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:26,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:26,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 16:22:26,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:22:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:26,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 16:22:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:22:26,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:27,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952863331] [2020-10-12 16:22:27,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:27,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:22:27,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022006359] [2020-10-12 16:22:27,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:22:27,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:22:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:22:27,247 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 28 states. [2020-10-12 16:22:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:28,782 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-12 16:22:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:22:28,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-12 16:22:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:28,785 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:22:28,785 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:22:28,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=301, Invalid=3359, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:22:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:22:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-12 16:22:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:22:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-12 16:22:28,797 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2020-10-12 16:22:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:28,797 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-12 16:22:28,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:22:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-12 16:22:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:22:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:28,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 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, 1] [2020-10-12 16:22:28,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:22:28,798 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1997415155, now seen corresponding path program 16 times [2020-10-12 16:22:28,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:28,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477691183] [2020-10-12 16:22:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:29,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:22:29,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:22:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:29,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:29,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:29,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:29,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:29,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:29,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:22:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 16:22:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:29,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:29,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:29,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-12 16:22:29,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:22:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:29,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477691183] [2020-10-12 16:22:29,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:29,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:22:29,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280658805] [2020-10-12 16:22:29,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:22:29,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:22:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:22:29,991 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 29 states. [2020-10-12 16:22:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:30,799 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-12 16:22:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:22:30,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-12 16:22:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:30,801 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:22:30,801 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:22:30,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:22:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:22:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-10-12 16:22:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:22:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-12 16:22:30,812 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2020-10-12 16:22:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:30,812 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-12 16:22:30,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:22:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-12 16:22:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:22:30,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:30,813 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 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, 1] [2020-10-12 16:22:30,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:22:30,813 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:30,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1180420955, now seen corresponding path program 15 times [2020-10-12 16:22:30,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:30,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188155774] [2020-10-12 16:22:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:30,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:30,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:22:31,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-12 16:22:31,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:22:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:22:31,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:31,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:31,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:31,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:31,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:31,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:22:31,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:22:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 16:22:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:31,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:31,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:22:31,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:31,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 16:22:31,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:31,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:22:31,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:31,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:22:31,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:22:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 73 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:31,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188155774] [2020-10-12 16:22:31,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:31,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:22:31,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132072821] [2020-10-12 16:22:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:22:31,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:22:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:22:31,991 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 29 states. [2020-10-12 16:22:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:33,157 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-12 16:22:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:22:33,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-12 16:22:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:33,160 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:22:33,160 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:22:33,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=532, Invalid=2438, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:22:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:22:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-10-12 16:22:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:22:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-12 16:22:33,171 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2020-10-12 16:22:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:33,171 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-12 16:22:33,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:22:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-12 16:22:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:22:33,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:33,172 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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, 1] [2020-10-12 16:22:33,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:22:33,172 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash 317385451, now seen corresponding path program 17 times [2020-10-12 16:22:33,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:33,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432451683] [2020-10-12 16:22:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:22:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:22:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:33,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:33,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:22:33,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:33,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 16:22:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:22:33,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:34,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432451683] [2020-10-12 16:22:34,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:34,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:22:34,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022519536] [2020-10-12 16:22:34,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:22:34,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:22:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:22:34,224 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 30 states. [2020-10-12 16:22:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:36,305 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-12 16:22:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:22:36,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-12 16:22:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:36,307 INFO L225 Difference]: With dead ends: 108 [2020-10-12 16:22:36,307 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 16:22:36,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 16:22:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-10-12 16:22:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:22:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-12 16:22:36,318 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2020-10-12 16:22:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:36,319 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-12 16:22:36,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:22:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-12 16:22:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:22:36,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:36,320 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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, 1] [2020-10-12 16:22:36,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:22:36,320 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1392032217, now seen corresponding path program 16 times [2020-10-12 16:22:36,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:36,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418051139] [2020-10-12 16:22:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:22:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:36,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:36,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:36,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:22:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 16:22:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:36,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 16:22:36,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:36,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:36,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:22:36,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:37,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418051139] [2020-10-12 16:22:37,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:37,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:22:37,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62171335] [2020-10-12 16:22:37,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:22:37,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:22:37,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:22:37,355 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 30 states. [2020-10-12 16:22:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:39,577 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-10-12 16:22:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:22:39,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-12 16:22:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:39,580 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:22:39,580 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:22:39,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:22:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-12 16:22:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:22:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-12 16:22:39,598 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2020-10-12 16:22:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:39,598 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-12 16:22:39,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:22:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-12 16:22:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:22:39,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:39,599 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 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, 1] [2020-10-12 16:22:39,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:22:39,599 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash -835126419, now seen corresponding path program 18 times [2020-10-12 16:22:39,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:39,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096166543] [2020-10-12 16:22:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:22:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:40,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:22:40,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:40,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:40,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:22:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:40,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 16:22:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:40,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:40,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:40,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:40,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:22:40,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:41,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096166543] [2020-10-12 16:22:41,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:41,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:22:41,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8517174] [2020-10-12 16:22:41,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:22:41,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:22:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:22:41,037 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 31 states. [2020-10-12 16:22:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:41,964 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-10-12 16:22:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:22:41,968 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-12 16:22:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:41,969 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:22:41,969 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:22:41,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=633, Invalid=2789, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:22:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:22:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-12 16:22:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:22:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-12 16:22:41,978 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2020-10-12 16:22:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:41,978 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-12 16:22:41,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:22:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-12 16:22:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:22:41,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:41,979 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 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, 1] [2020-10-12 16:22:41,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:22:41,980 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1661709179, now seen corresponding path program 17 times [2020-10-12 16:22:41,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:41,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895495785] [2020-10-12 16:22:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:41,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:22:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:22:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 16:22:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:22:42,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:43,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895495785] [2020-10-12 16:22:43,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:43,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:22:43,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54891712] [2020-10-12 16:22:43,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:22:43,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:43,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:22:43,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:22:43,115 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 31 states. [2020-10-12 16:22:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:44,059 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-12 16:22:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:22:44,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-12 16:22:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:44,064 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:22:44,064 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:22:44,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=633, Invalid=2789, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:22:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:22:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-12 16:22:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:22:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-12 16:22:44,076 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2020-10-12 16:22:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:44,076 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-12 16:22:44,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:22:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-12 16:22:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:22:44,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:44,077 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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, 1] [2020-10-12 16:22:44,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:22:44,077 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1998318155, now seen corresponding path program 19 times [2020-10-12 16:22:44,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:44,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449065055] [2020-10-12 16:22:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:44,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:44,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:44,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:22:44,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:44,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:44,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:44,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:44,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:44,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:22:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:44,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 16:22:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:22:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:45,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449065055] [2020-10-12 16:22:45,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:45,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:22:45,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089330457] [2020-10-12 16:22:45,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:22:45,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:22:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:22:45,171 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 32 states. [2020-10-12 16:22:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:46,806 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-12 16:22:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:22:46,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-12 16:22:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:46,809 INFO L225 Difference]: With dead ends: 112 [2020-10-12 16:22:46,809 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 16:22:46,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=3518, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:22:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 16:22:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-10-12 16:22:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:22:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-12 16:22:46,821 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2020-10-12 16:22:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:46,821 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-12 16:22:46,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:22:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-12 16:22:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:22:46,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:46,822 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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, 1] [2020-10-12 16:22:46,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:22:46,822 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -53547513, now seen corresponding path program 18 times [2020-10-12 16:22:46,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:46,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287614174] [2020-10-12 16:22:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:22:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:22:47,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:47,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:47,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:47,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:47,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:47,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:47,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:47,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:47,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:22:47,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:47,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 16:22:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:47,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:47,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:47,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:22:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287614174] [2020-10-12 16:22:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:22:47,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301953843] [2020-10-12 16:22:47,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:22:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:22:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:22:47,892 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 32 states. [2020-10-12 16:22:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:49,642 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-10-12 16:22:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:22:49,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-12 16:22:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:49,644 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:22:49,644 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:22:49,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=3518, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:22:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:22:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-10-12 16:22:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:22:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-12 16:22:49,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2020-10-12 16:22:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:49,655 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-12 16:22:49,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:22:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-12 16:22:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:22:49,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:49,656 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 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, 1] [2020-10-12 16:22:49,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:22:49,656 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:49,657 INFO L82 PathProgramCache]: Analyzing trace with hash -366501171, now seen corresponding path program 20 times [2020-10-12 16:22:49,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:49,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830222118] [2020-10-12 16:22:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:49,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:22:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:22:50,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:50,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:50,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:50,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:22:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:50,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 16:22:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:50,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:22:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:50,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830222118] [2020-10-12 16:22:50,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:50,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:22:50,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378874828] [2020-10-12 16:22:50,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:22:50,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:22:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:22:50,916 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 33 states. [2020-10-12 16:22:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:51,937 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-12 16:22:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:22:51,938 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-12 16:22:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:51,940 INFO L225 Difference]: With dead ends: 109 [2020-10-12 16:22:51,940 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:22:51,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=722, Invalid=3184, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:22:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:22:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-12 16:22:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:22:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-12 16:22:51,953 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2020-10-12 16:22:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:51,954 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-12 16:22:51,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:22:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-12 16:22:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:22:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:51,955 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 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, 1] [2020-10-12 16:22:51,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:22:51,955 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash -122577563, now seen corresponding path program 19 times [2020-10-12 16:22:51,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:51,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119569666] [2020-10-12 16:22:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:22:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:22:52,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:52,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:52,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:52,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:52,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:52,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:52,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:52,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:52,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:52,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:52,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:52,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:52,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 16:22:52,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:52,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:22:52,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:52,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 16:22:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:52,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:52,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:22:52,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:52,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 16:22:52,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:52,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:22:52,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:52,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:22:52,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 110 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:53,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119569666] [2020-10-12 16:22:53,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:53,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:22:53,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296373221] [2020-10-12 16:22:53,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:22:53,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:22:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:22:53,256 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 33 states. [2020-10-12 16:22:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:55,343 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-12 16:22:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:22:55,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-12 16:22:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:55,345 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:22:55,345 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:22:55,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=894, Invalid=4218, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:22:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:22:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-12 16:22:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:22:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-12 16:22:55,357 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2020-10-12 16:22:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:55,357 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-12 16:22:55,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:22:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-12 16:22:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 16:22:55,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:55,358 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1] [2020-10-12 16:22:55,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:22:55,358 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097515, now seen corresponding path program 21 times [2020-10-12 16:22:55,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:55,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689539875] [2020-10-12 16:22:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:55,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:22:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:22:55,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:55,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:55,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:55,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:55,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:55,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:55,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:55,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:55,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:22:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 16:22:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:55,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:56,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:22:56,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:56,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689539875] [2020-10-12 16:22:56,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:56,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:22:56,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716394944] [2020-10-12 16:22:56,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:22:56,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:22:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:22:56,599 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 34 states. [2020-10-12 16:22:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:58,435 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-12 16:22:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:22:58,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-12 16:22:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:58,437 INFO L225 Difference]: With dead ends: 116 [2020-10-12 16:22:58,438 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 16:22:58,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=4008, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:22:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 16:22:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-12 16:22:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:22:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-12 16:22:58,452 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2020-10-12 16:22:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:58,452 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-12 16:22:58,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:22:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-12 16:22:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 16:22:58,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:58,453 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1] [2020-10-12 16:22:58,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:22:58,453 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1583185639, now seen corresponding path program 20 times [2020-10-12 16:22:58,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:58,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914218252] [2020-10-12 16:22:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:58,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:58,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:58,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:22:58,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:22:58,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:58,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:58,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:58,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:58,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:58,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:58,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:58,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:58,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:58,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:58,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:58,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 16:22:58,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:22:58,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:59,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 16:22:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:59,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:22:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:59,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914218252] [2020-10-12 16:22:59,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:59,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:22:59,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054214654] [2020-10-12 16:22:59,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:22:59,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:22:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:22:59,721 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 34 states. [2020-10-12 16:23:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:01,602 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-12 16:23:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:23:01,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-12 16:23:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:01,604 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:23:01,604 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:23:01,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=4008, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:23:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:23:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-10-12 16:23:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:23:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-12 16:23:01,620 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2020-10-12 16:23:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:01,620 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-12 16:23:01,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:23:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-12 16:23:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 16:23:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:01,621 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 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, 1] [2020-10-12 16:23:01,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:23:01,621 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1421405395, now seen corresponding path program 22 times [2020-10-12 16:23:01,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:01,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273171390] [2020-10-12 16:23:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:01,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:02,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:23:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:23:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:02,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:02,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:02,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:02,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:02,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:02,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:02,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:02,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:02,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:02,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:23:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:02,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 16:23:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:02,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:23:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 133 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:03,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273171390] [2020-10-12 16:23:03,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:03,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:23:03,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348225279] [2020-10-12 16:23:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:23:03,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:23:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:23:03,184 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 35 states. [2020-10-12 16:23:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:04,433 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-12 16:23:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:23:04,434 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-12 16:23:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:04,436 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:23:04,436 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 16:23:04,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=793, Invalid=3629, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:23:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 16:23:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-10-12 16:23:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:23:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-12 16:23:04,447 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2020-10-12 16:23:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:04,447 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-12 16:23:04,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:23:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-12 16:23:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 16:23:04,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:04,448 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 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, 1] [2020-10-12 16:23:04,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:23:04,448 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1081954117, now seen corresponding path program 21 times [2020-10-12 16:23:04,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:04,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180661925] [2020-10-12 16:23:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:04,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:04,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:23:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:23:05,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:05,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:23:05,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 16:23:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:23:05,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:23:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 132 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:06,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180661925] [2020-10-12 16:23:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:06,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:23:06,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078817884] [2020-10-12 16:23:06,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:23:06,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:23:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:23:06,214 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 35 states. [2020-10-12 16:23:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:07,776 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2020-10-12 16:23:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:23:07,777 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-12 16:23:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:07,779 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:23:07,779 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:23:07,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1037, Invalid=4815, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:23:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:23:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-10-12 16:23:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:23:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-12 16:23:07,794 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2020-10-12 16:23:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:07,794 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-12 16:23:07,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:23:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-12 16:23:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:23:07,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:07,795 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 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, 1] [2020-10-12 16:23:07,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:23:07,796 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2068560885, now seen corresponding path program 23 times [2020-10-12 16:23:07,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:07,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119262359] [2020-10-12 16:23:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:07,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:08,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:23:08,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:08,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:08,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:08,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:08,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:08,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:08,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:08,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:08,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:08,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:08,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 16:23:08,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:08,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:23:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 16:23:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:08,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:08,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:08,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:08,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 16:23:08,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:08,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:08,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:08,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:23:08,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:09,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119262359] [2020-10-12 16:23:09,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:09,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:23:09,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240552621] [2020-10-12 16:23:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:23:09,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:23:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:23:09,353 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 36 states. [2020-10-12 16:23:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:11,469 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-12 16:23:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:23:11,470 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-12 16:23:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:11,472 INFO L225 Difference]: With dead ends: 120 [2020-10-12 16:23:11,472 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 16:23:11,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=300, Invalid=4530, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:23:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 16:23:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-10-12 16:23:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:23:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-12 16:23:11,488 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2020-10-12 16:23:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:11,489 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-12 16:23:11,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:23:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-12 16:23:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:23:11,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:11,490 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 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, 1] [2020-10-12 16:23:11,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:23:11,490 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash -503039801, now seen corresponding path program 22 times [2020-10-12 16:23:11,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:11,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359113664] [2020-10-12 16:23:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:23:11,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:11,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:11,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:11,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:11,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:11,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:11,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:11,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:11,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:11,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:23:11,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:12,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 16:23:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:12,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:12,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 16:23:12,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:23:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:13,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359113664] [2020-10-12 16:23:13,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:13,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:23:13,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886592729] [2020-10-12 16:23:13,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:23:13,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:13,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:23:13,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:23:13,021 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 36 states. [2020-10-12 16:23:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:15,057 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2020-10-12 16:23:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:23:15,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-12 16:23:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:15,059 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:23:15,059 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 16:23:15,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=300, Invalid=4530, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:23:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 16:23:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-10-12 16:23:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 16:23:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-12 16:23:15,074 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2020-10-12 16:23:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:15,074 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-12 16:23:15,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:23:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-12 16:23:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 16:23:15,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:15,075 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 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, 1] [2020-10-12 16:23:15,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:23:15,075 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -217019251, now seen corresponding path program 24 times [2020-10-12 16:23:15,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:15,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388530914] [2020-10-12 16:23:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:15,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:15,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:15,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:23:15,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:15,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:15,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:15,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:15,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:15,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:15,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:15,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:15,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:15,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:15,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:15,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:15,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:15,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 16:23:15,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:15,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:15,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:15,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:23:15,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:16,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 16:23:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:16,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:16,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:23:16,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 156 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:16,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388530914] [2020-10-12 16:23:16,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:16,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:23:16,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903110759] [2020-10-12 16:23:16,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:23:16,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:23:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:23:16,644 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 37 states. [2020-10-12 16:23:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:18,308 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2020-10-12 16:23:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:23:18,309 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-12 16:23:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:18,311 INFO L225 Difference]: With dead ends: 108 [2020-10-12 16:23:18,311 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:23:18,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1177, Invalid=5465, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:23:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:23:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 16:23:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:23:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-12 16:23:18,322 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2020-10-12 16:23:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:18,323 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-12 16:23:18,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:23:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-12 16:23:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 16:23:18,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:18,324 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 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, 1] [2020-10-12 16:23:18,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:23:18,324 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 350792229, now seen corresponding path program 23 times [2020-10-12 16:23:18,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:18,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837656583] [2020-10-12 16:23:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:18,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:18,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:18,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:23:18,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:18,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-12 16:23:18,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:23:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:23:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:18,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:18,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:18,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:18,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:18,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:18,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:18,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:18,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:18,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:18,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:18,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:18,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:19,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:23:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 16:23:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:19,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:19,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:23:19,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 16:23:19,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:23:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:23:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:19,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837656583] [2020-10-12 16:23:19,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:19,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:23:19,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744740438] [2020-10-12 16:23:19,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:23:19,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:23:19,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:23:19,942 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 37 states. [2020-10-12 16:23:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:21,131 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2020-10-12 16:23:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:23:21,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-12 16:23:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:21,136 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:23:21,136 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:23:21,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=918, Invalid=4052, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:23:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:23:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2020-10-12 16:23:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:23:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-12 16:23:21,150 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2020-10-12 16:23:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:21,150 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-12 16:23:21,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:23:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-12 16:23:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 16:23:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:21,151 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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, 1] [2020-10-12 16:23:21,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:23:21,152 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:21,152 INFO L82 PathProgramCache]: Analyzing trace with hash -23191957, now seen corresponding path program 25 times [2020-10-12 16:23:21,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:21,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533585465] [2020-10-12 16:23:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:21,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:21,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 16:23:21,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:21,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-12 16:23:21,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:21,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:23:21,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:21,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:23:21,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:21,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:21,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:21,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:21,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:21,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:21,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:21,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:21,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:23:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 16:23:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:22,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:22,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:22,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:22,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:22,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 16:23:22,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:22,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:23:22,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:22,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533585465] [2020-10-12 16:23:22,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:22,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:23:22,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686820873] [2020-10-12 16:23:22,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:23:22,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:22,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:23:22,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:23:22,847 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 38 states. [2020-10-12 16:23:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:25,106 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-12 16:23:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:23:25,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-12 16:23:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:25,108 INFO L225 Difference]: With dead ends: 124 [2020-10-12 16:23:25,108 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:23:25,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=318, Invalid=5084, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:23:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:23:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-10-12 16:23:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:23:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-12 16:23:25,124 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2020-10-12 16:23:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:25,125 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-12 16:23:25,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:23:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-12 16:23:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 16:23:25,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:25,126 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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, 1] [2020-10-12 16:23:25,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:23:25,126 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1225022375, now seen corresponding path program 24 times [2020-10-12 16:23:25,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:25,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051800865] [2020-10-12 16:23:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:23:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:23:25,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:25,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:23:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 16:23:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:26,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:26,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:26,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:26,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 16:23:26,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:23:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:26,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051800865] [2020-10-12 16:23:26,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:26,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:23:26,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434440704] [2020-10-12 16:23:26,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:23:26,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:23:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:23:26,735 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 38 states. [2020-10-12 16:23:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:29,183 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-10-12 16:23:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:23:29,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-12 16:23:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:29,185 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:23:29,185 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 16:23:29,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=318, Invalid=5084, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:23:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 16:23:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-10-12 16:23:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:23:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-12 16:23:29,199 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2020-10-12 16:23:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:29,199 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-12 16:23:29,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:23:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-12 16:23:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:23:29,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:29,200 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 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, 1] [2020-10-12 16:23:29,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:23:29,200 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:29,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1712501011, now seen corresponding path program 26 times [2020-10-12 16:23:29,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:29,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464083894] [2020-10-12 16:23:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:29,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:23:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:23:29,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:29,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:29,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:29,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:29,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:29,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:29,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:29,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:29,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 16:23:29,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:23:29,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:30,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 16:23:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:30,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:30,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:23:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 183 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:31,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464083894] [2020-10-12 16:23:31,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:31,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:23:31,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37608478] [2020-10-12 16:23:31,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:23:31,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:23:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:23:31,045 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 39 states. [2020-10-12 16:23:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:32,424 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2020-10-12 16:23:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:23:32,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-12 16:23:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:32,426 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:23:32,426 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:23:32,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=997, Invalid=4553, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:23:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:23:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-10-12 16:23:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:23:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-12 16:23:32,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2020-10-12 16:23:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:32,448 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-12 16:23:32,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:23:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-12 16:23:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:23:32,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:32,449 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 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, 1] [2020-10-12 16:23:32,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:23:32,450 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1485509115, now seen corresponding path program 25 times [2020-10-12 16:23:32,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:32,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675485150] [2020-10-12 16:23:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:23:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:33,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:33,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:33,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:33,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:33,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:33,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:33,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:23:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:33,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 16:23:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:33,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:33,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:23:33,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:33,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-12 16:23:33,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:23:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:23:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 183 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:34,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675485150] [2020-10-12 16:23:34,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:34,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:23:34,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350690254] [2020-10-12 16:23:34,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:23:34,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:23:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:23:34,213 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 39 states. [2020-10-12 16:23:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:35,540 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-10-12 16:23:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:23:35,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-12 16:23:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:35,542 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:23:35,542 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:23:35,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=997, Invalid=4553, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:23:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:23:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-12 16:23:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:23:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-12 16:23:35,558 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2020-10-12 16:23:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:35,559 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-12 16:23:35,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:23:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-12 16:23:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 16:23:35,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:35,560 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 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, 1] [2020-10-12 16:23:35,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:23:35,560 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 511885771, now seen corresponding path program 27 times [2020-10-12 16:23:35,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:35,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605849788] [2020-10-12 16:23:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:23:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:23:35,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:35,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:35,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:35,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:35,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:35,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 16:23:35,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:23:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:36,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 16:23:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:36,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:36,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:36,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:23:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:37,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605849788] [2020-10-12 16:23:37,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:37,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:23:37,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923026213] [2020-10-12 16:23:37,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:23:37,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:23:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:23:37,273 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 40 states. [2020-10-12 16:23:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:39,697 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-12 16:23:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:23:39,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-12 16:23:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:39,699 INFO L225 Difference]: With dead ends: 128 [2020-10-12 16:23:39,699 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 16:23:39,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=336, Invalid=5670, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:23:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 16:23:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-12 16:23:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:23:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-12 16:23:39,714 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2020-10-12 16:23:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:39,715 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-12 16:23:39,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:23:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-12 16:23:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 16:23:39,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:39,715 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 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, 1] [2020-10-12 16:23:39,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:23:39,716 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1770989447, now seen corresponding path program 26 times [2020-10-12 16:23:39,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:39,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786863077] [2020-10-12 16:23:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:23:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:40,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:40,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:40,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:40,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:40,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:40,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:40,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:40,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:40,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:40,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:40,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:40,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:40,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:40,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:40,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:40,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:23:40,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:23:40,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:40,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 16:23:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:40,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:40,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 16:23:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:23:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:41,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786863077] [2020-10-12 16:23:41,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:41,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:23:41,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901255178] [2020-10-12 16:23:41,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:23:41,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:23:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:23:41,512 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 40 states. [2020-10-12 16:23:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:43,841 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2020-10-12 16:23:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:23:43,842 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-12 16:23:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:43,843 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:23:43,843 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:23:43,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=336, Invalid=5670, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:23:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:23:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-10-12 16:23:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:23:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-10-12 16:23:43,862 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2020-10-12 16:23:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:43,862 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-10-12 16:23:43,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:23:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-10-12 16:23:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 16:23:43,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:43,863 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 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, 1] [2020-10-12 16:23:43,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:23:43,864 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1396087373, now seen corresponding path program 28 times [2020-10-12 16:23:43,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:43,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10981332] [2020-10-12 16:23:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:23:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:23:44,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:44,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:44,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:23:44,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:45,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 16:23:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:45,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:45,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:23:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:45,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10981332] [2020-10-12 16:23:45,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:45,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:23:45,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312911961] [2020-10-12 16:23:45,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:23:45,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:23:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:23:45,819 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 41 states. [2020-10-12 16:23:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:47,223 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-10-12 16:23:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:23:47,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-12 16:23:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:47,225 INFO L225 Difference]: With dead ends: 125 [2020-10-12 16:23:47,225 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 16:23:47,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1138, Invalid=5024, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:23:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 16:23:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-10-12 16:23:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:23:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-12 16:23:47,243 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-12 16:23:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:47,244 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-12 16:23:47,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:23:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-12 16:23:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 16:23:47,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:47,245 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 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, 1] [2020-10-12 16:23:47,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:23:47,245 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash 512973541, now seen corresponding path program 27 times [2020-10-12 16:23:47,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:47,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883135870] [2020-10-12 16:23:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:47,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:23:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:48,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:48,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:48,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-12 16:23:48,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:23:48,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:48,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 16:23:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:23:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 210 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:49,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883135870] [2020-10-12 16:23:49,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:49,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:23:49,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889234653] [2020-10-12 16:23:49,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:23:49,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:23:49,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:23:49,271 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 41 states. [2020-10-12 16:23:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:52,701 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2020-10-12 16:23:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:23:52,702 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-12 16:23:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:52,703 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:23:52,703 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:23:52,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1466, Invalid=6906, Unknown=0, NotChecked=0, Total=8372 [2020-10-12 16:23:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:23:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-12 16:23:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 16:23:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-12 16:23:52,719 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2020-10-12 16:23:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:52,720 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-12 16:23:52,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:23:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-12 16:23:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:23:52,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:52,721 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 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, 1] [2020-10-12 16:23:52,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:23:52,721 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash -671388117, now seen corresponding path program 29 times [2020-10-12 16:23:52,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:52,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056441023] [2020-10-12 16:23:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:52,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:23:53,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:53,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:23:53,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:53,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:53,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:53,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:53,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:53,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:53,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:53,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:53,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:53,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:53,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:23:53,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:53,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 16:23:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:23:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:54,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056441023] [2020-10-12 16:23:54,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:23:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857923880] [2020-10-12 16:23:54,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:23:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:23:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1607, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:23:54,709 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 42 states. [2020-10-12 16:23:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:58,005 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-12 16:23:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:23:58,006 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-12 16:23:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:58,008 INFO L225 Difference]: With dead ends: 132 [2020-10-12 16:23:58,008 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 16:23:58,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=354, Invalid=6288, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:23:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 16:23:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-10-12 16:23:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 16:23:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-12 16:23:58,026 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2020-10-12 16:23:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:58,026 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-12 16:23:58,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:23:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-12 16:23:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:23:58,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:58,027 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 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, 1] [2020-10-12 16:23:58,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:23:58,028 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1832526745, now seen corresponding path program 28 times [2020-10-12 16:23:58,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:58,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550606218] [2020-10-12 16:23:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:58,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:23:58,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:58,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:58,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:58,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:58,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:58,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:58,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:58,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:58,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:23:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:58,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:58,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:58,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:23:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 16:23:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:59,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:59,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:23:59,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:23:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:00,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550606218] [2020-10-12 16:24:00,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:00,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:24:00,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079216649] [2020-10-12 16:24:00,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:24:00,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:24:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1607, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:24:00,037 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 42 states. [2020-10-12 16:24:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:03,285 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2020-10-12 16:24:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:24:03,287 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-12 16:24:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:03,288 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:24:03,289 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 16:24:03,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=354, Invalid=6288, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:24:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 16:24:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2020-10-12 16:24:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 16:24:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-12 16:24:03,310 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2020-10-12 16:24:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:03,310 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-12 16:24:03,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:24:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-12 16:24:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 16:24:03,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:03,324 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 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, 1] [2020-10-12 16:24:03,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:24:03,324 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1858752851, now seen corresponding path program 30 times [2020-10-12 16:24:03,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:03,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259887899] [2020-10-12 16:24:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:24:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:24:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:04,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:04,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:04,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:04,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:04,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:04,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:24:04,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 16:24:04,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:24:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:24:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:04,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 16:24:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:04,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:04,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-12 16:24:04,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:24:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:05,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259887899] [2020-10-12 16:24:05,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:05,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:24:05,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392646513] [2020-10-12 16:24:05,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:24:05,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:24:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:24:05,580 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 43 states. [2020-10-12 16:24:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:07,114 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-12 16:24:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:24:07,115 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-12 16:24:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:07,117 INFO L225 Difference]: With dead ends: 129 [2020-10-12 16:24:07,117 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 16:24:07,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1257, Invalid=5549, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:24:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 16:24:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-10-12 16:24:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:24:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-12 16:24:07,129 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2020-10-12 16:24:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:07,130 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-12 16:24:07,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:24:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-12 16:24:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 16:24:07,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:07,130 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 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, 1] [2020-10-12 16:24:07,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:24:07,131 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash -106614587, now seen corresponding path program 29 times [2020-10-12 16:24:07,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:07,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415424293] [2020-10-12 16:24:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:07,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:07,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:24:07,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:07,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:07,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:07,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:07,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:07,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:07,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:07,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:07,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:07,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:08,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:24:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:08,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 16:24:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:08,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:08,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:24:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:24:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:09,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415424293] [2020-10-12 16:24:09,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:09,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:24:09,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871986875] [2020-10-12 16:24:09,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:24:09,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:24:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:24:09,350 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 43 states. [2020-10-12 16:24:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:10,880 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-12 16:24:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:24:10,880 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-12 16:24:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:10,881 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:24:10,881 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 16:24:10,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1257, Invalid=5549, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:24:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 16:24:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2020-10-12 16:24:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 16:24:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-12 16:24:10,901 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2020-10-12 16:24:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:10,902 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-12 16:24:10,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:24:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-12 16:24:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 16:24:10,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:10,903 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 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, 1] [2020-10-12 16:24:10,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:24:10,903 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:10,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1114545269, now seen corresponding path program 31 times [2020-10-12 16:24:10,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:10,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060930511] [2020-10-12 16:24:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:11,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:11,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 16:24:11,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:24:11,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:11,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:11,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:11,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:11,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:11,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:11,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:11,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:11,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:24:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:12,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 16:24:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:24:12,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:13,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060930511] [2020-10-12 16:24:13,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:13,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:24:13,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793873561] [2020-10-12 16:24:13,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:24:13,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:24:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:24:13,121 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 44 states. [2020-10-12 16:24:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:16,919 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-10-12 16:24:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:24:16,921 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-12 16:24:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:16,922 INFO L225 Difference]: With dead ends: 132 [2020-10-12 16:24:16,922 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 16:24:16,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2966 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=520, Invalid=9580, Unknown=0, NotChecked=0, Total=10100 [2020-10-12 16:24:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 16:24:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-10-12 16:24:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:24:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-12 16:24:16,942 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2020-10-12 16:24:16,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:16,942 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-12 16:24:16,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:24:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-12 16:24:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 16:24:16,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:16,943 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 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, 1] [2020-10-12 16:24:16,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:24:16,944 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash -256263609, now seen corresponding path program 30 times [2020-10-12 16:24:16,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:16,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892149150] [2020-10-12 16:24:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:24:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:17,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:17,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:17,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:17,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:17,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:17,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:17,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:24:17,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:24:17,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:18,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 16:24:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:18,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:24:18,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:19,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892149150] [2020-10-12 16:24:19,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:19,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:24:19,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521717878] [2020-10-12 16:24:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:24:19,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:24:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:24:19,035 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 44 states. [2020-10-12 16:24:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:21,858 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2020-10-12 16:24:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:24:21,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-12 16:24:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:21,860 INFO L225 Difference]: With dead ends: 131 [2020-10-12 16:24:21,860 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 16:24:21,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=372, Invalid=6938, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:24:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 16:24:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-12 16:24:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 16:24:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-10-12 16:24:21,880 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2020-10-12 16:24:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:21,880 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-10-12 16:24:21,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:24:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-10-12 16:24:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:24:21,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:21,881 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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, 1] [2020-10-12 16:24:21,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:24:21,882 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1763953677, now seen corresponding path program 32 times [2020-10-12 16:24:21,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:21,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299501262] [2020-10-12 16:24:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:21,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:22,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 16:24:22,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:24:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:22,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:22,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:22,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:22,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:22,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:22,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:24:22,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:23,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 16:24:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:23,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:23,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:23,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-12 16:24:23,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:24:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 273 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:24,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299501262] [2020-10-12 16:24:24,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:24,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:24:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228589983] [2020-10-12 16:24:24,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:24:24,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:24:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1584, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:24:24,403 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 45 states. [2020-10-12 16:24:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:27,390 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-12 16:24:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:24:27,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-12 16:24:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:27,391 INFO L225 Difference]: With dead ends: 133 [2020-10-12 16:24:27,391 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:24:27,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1330, Invalid=6152, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:24:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:24:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2020-10-12 16:24:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:24:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-12 16:24:27,412 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2020-10-12 16:24:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:27,413 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-12 16:24:27,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:24:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-12 16:24:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:24:27,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:27,414 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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, 1] [2020-10-12 16:24:27,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:24:27,414 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1962651557, now seen corresponding path program 31 times [2020-10-12 16:24:27,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:27,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849386659] [2020-10-12 16:24:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:27,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:28,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:28,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 16:24:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:28,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:28,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:28,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:28,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:28,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:28,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:28,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:28,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:28,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:28,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:28,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:24:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:28,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 16:24:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:28,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:28,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:28,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:24:28,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:24:28,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:29,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849386659] [2020-10-12 16:24:29,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:29,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:24:29,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568754385] [2020-10-12 16:24:29,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:24:29,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:24:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:24:29,838 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 45 states. [2020-10-12 16:24:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:31,476 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-12 16:24:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:24:31,476 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-12 16:24:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:31,477 INFO L225 Difference]: With dead ends: 131 [2020-10-12 16:24:31,477 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:24:31,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1382, Invalid=6100, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:24:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:24:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-12 16:24:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 16:24:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-12 16:24:31,493 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2020-10-12 16:24:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:31,493 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-12 16:24:31,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:24:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-12 16:24:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 16:24:31,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:31,494 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 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, 1] [2020-10-12 16:24:31,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:24:31,495 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash -457317909, now seen corresponding path program 33 times [2020-10-12 16:24:31,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:31,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213163911] [2020-10-12 16:24:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:31,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:31,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:31,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:24:31,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:31,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:31,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:31,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:32,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:32,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:32,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 16:24:32,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:24:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:32,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 16:24:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:32,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:24:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:33,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213163911] [2020-10-12 16:24:33,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:33,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:24:33,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287898268] [2020-10-12 16:24:33,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:24:33,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:24:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:24:33,933 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 46 states. [2020-10-12 16:24:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:38,174 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-10-12 16:24:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:24:38,175 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-12 16:24:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:38,177 INFO L225 Difference]: With dead ends: 136 [2020-10-12 16:24:38,177 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 16:24:38,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=547, Invalid=10583, Unknown=0, NotChecked=0, Total=11130 [2020-10-12 16:24:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 16:24:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2020-10-12 16:24:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:24:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-12 16:24:38,193 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2020-10-12 16:24:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:38,193 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-12 16:24:38,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:24:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-12 16:24:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 16:24:38,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:38,195 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 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, 1] [2020-10-12 16:24:38,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:24:38,195 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash -261357273, now seen corresponding path program 32 times [2020-10-12 16:24:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:38,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186763697] [2020-10-12 16:24:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:38,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:24:38,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:24:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:38,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:38,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:38,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:38,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:24:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 16:24:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:39,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:24:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:40,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186763697] [2020-10-12 16:24:40,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:40,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:24:40,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758476352] [2020-10-12 16:24:40,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:24:40,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:24:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1943, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:24:40,530 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 46 states. [2020-10-12 16:24:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:43,638 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2020-10-12 16:24:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:24:43,639 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-12 16:24:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:43,640 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:24:43,640 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 16:24:43,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=390, Invalid=7620, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:24:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 16:24:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2020-10-12 16:24:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 16:24:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-10-12 16:24:43,662 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2020-10-12 16:24:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:43,662 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-10-12 16:24:43,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:24:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-10-12 16:24:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 16:24:43,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:43,663 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 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, 1] [2020-10-12 16:24:43,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:24:43,663 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1999254125, now seen corresponding path program 34 times [2020-10-12 16:24:43,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:43,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826262237] [2020-10-12 16:24:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:44,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:24:44,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:44,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:44,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:44,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:44,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:44,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:44,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:44,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:44,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:44,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 16:24:44,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:24:44,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:45,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 16:24:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:24:45,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:46,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826262237] [2020-10-12 16:24:46,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:46,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:24:46,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610112253] [2020-10-12 16:24:46,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:24:46,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:24:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:24:46,168 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 47 states. [2020-10-12 16:24:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:48,054 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2020-10-12 16:24:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:24:48,055 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-12 16:24:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:48,057 INFO L225 Difference]: With dead ends: 137 [2020-10-12 16:24:48,057 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 16:24:48,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1493, Invalid=6697, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:24:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 16:24:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-10-12 16:24:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:24:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-12 16:24:48,079 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2020-10-12 16:24:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:48,079 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-12 16:24:48,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:24:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-12 16:24:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 16:24:48,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:48,080 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 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, 1] [2020-10-12 16:24:48,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:24:48,080 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash -304605307, now seen corresponding path program 33 times [2020-10-12 16:24:48,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:48,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090218718] [2020-10-12 16:24:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:48,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:48,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:24:48,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:48,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:48,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:48,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:24:48,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:48,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:48,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:48,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:48,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:24:48,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:24:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 16:24:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:49,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:49,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:24:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 307 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:50,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090218718] [2020-10-12 16:24:50,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:50,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:24:50,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31875751] [2020-10-12 16:24:50,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:24:50,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:24:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1707, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:24:50,639 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 47 states. [2020-10-12 16:24:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:52,590 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-10-12 16:24:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:24:52,591 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-12 16:24:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:52,592 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:24:52,592 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 16:24:52,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1477, Invalid=6713, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:24:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 16:24:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2020-10-12 16:24:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 16:24:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-12 16:24:52,608 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2020-10-12 16:24:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:52,609 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-12 16:24:52,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:24:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-12 16:24:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 16:24:52,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:52,609 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 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, 1] [2020-10-12 16:24:52,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:24:52,610 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash -907400885, now seen corresponding path program 35 times [2020-10-12 16:24:52,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:52,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606893948] [2020-10-12 16:24:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:53,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:24:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:53,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:53,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:53,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:53,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:53,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:53,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:24:53,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:53,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:53,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:53,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:24:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:24:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:53,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:24:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:53,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 16:24:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:54,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:24:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:55,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606893948] [2020-10-12 16:24:55,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:55,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:24:55,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124903914] [2020-10-12 16:24:55,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:24:55,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:24:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:24:55,923 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 48 states. [2020-10-12 16:25:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:02,974 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-12 16:25:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:25:02,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-12 16:25:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:02,977 INFO L225 Difference]: With dead ends: 144 [2020-10-12 16:25:02,977 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 16:25:02,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=368, Invalid=8374, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 16:25:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 16:25:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-12 16:25:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 16:25:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-12 16:25:02,994 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2020-10-12 16:25:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:02,994 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-12 16:25:02,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:25:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-12 16:25:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 16:25:02,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:02,995 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 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, 1] [2020-10-12 16:25:02,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:25:02,995 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:02,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1546784505, now seen corresponding path program 34 times [2020-10-12 16:25:02,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:02,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743434284] [2020-10-12 16:25:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:25:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:25:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:25:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:03,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:03,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:03,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:03,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:03,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:03,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:03,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:25:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:03,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:25:03,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 16:25:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:04,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:04,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:25:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:06,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743434284] [2020-10-12 16:25:06,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:06,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:25:06,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094378269] [2020-10-12 16:25:06,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:25:06,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:25:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:25:06,341 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 48 states. [2020-10-12 16:25:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:13,298 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2020-10-12 16:25:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:25:13,299 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-12 16:25:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:13,300 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:25:13,301 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 16:25:13,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=368, Invalid=8374, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 16:25:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 16:25:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-12 16:25:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 16:25:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-12 16:25:13,323 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2020-10-12 16:25:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:13,323 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-12 16:25:13,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:25:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-12 16:25:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 16:25:13,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:13,324 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 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, 1] [2020-10-12 16:25:13,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:25:13,324 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1033756211, now seen corresponding path program 36 times [2020-10-12 16:25:13,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:13,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403141606] [2020-10-12 16:25:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:13,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:14,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 16:25:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:14,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:14,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:14,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:14,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:14,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:25:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:14,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:14,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:25:14,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-12 16:25:14,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:25:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:25:14,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:15,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 16:25:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:15,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:15,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:15,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:25:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 16:25:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:25:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:16,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403141606] [2020-10-12 16:25:16,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:16,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:25:16,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437171193] [2020-10-12 16:25:16,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:25:16,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:25:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1816, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:25:16,460 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 49 states. [2020-10-12 16:25:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:18,681 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2020-10-12 16:25:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:25:18,683 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2020-10-12 16:25:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:18,684 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:25:18,685 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 16:25:18,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2890 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2020-10-12 16:25:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 16:25:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2020-10-12 16:25:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:25:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-12 16:25:18,709 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2020-10-12 16:25:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:18,709 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-12 16:25:18,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:25:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-12 16:25:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 16:25:18,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:18,710 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 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, 1] [2020-10-12 16:25:18,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:25:18,711 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:18,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1181460581, now seen corresponding path program 35 times [2020-10-12 16:25:18,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:18,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106369175] [2020-10-12 16:25:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:18,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:18,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:19,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 16:25:19,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-12 16:25:19,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:25:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:25:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 16:25:19,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:19,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:19,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:19,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:19,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:19,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:25:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:19,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:19,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:19,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:25:19,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:19,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 16:25:19,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:25:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:25:19,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0